diff --git a/openpype/modules/slack/README.md b/openpype/modules/slack/README.md
index 5e099be9e7..a189fdf978 100644
--- a/openpype/modules/slack/README.md
+++ b/openpype/modules/slack/README.md
@@ -43,4 +43,7 @@ Placeholders {} could be used in message content which will be filled during run
 Only keys available in 'anatomyData' are currently implemented.
 
 Example of message content:
-```{SUBSET} for {Asset} was published.```
\ No newline at end of file
+```{SUBSET} for {Asset} was published.```
+
+Integration can upload 'thumbnail' file (if present in instance), for that bot must be 
+manually added to target channel by Slack admin!
\ No newline at end of file
diff --git a/openpype/modules/slack/plugins/publish/integrate_slack_api.py b/openpype/modules/slack/plugins/publish/integrate_slack_api.py
index 3244df6b16..0c7d3c5ebd 100644
--- a/openpype/modules/slack/plugins/publish/integrate_slack_api.py
+++ b/openpype/modules/slack/plugins/publish/integrate_slack_api.py
@@ -1,3 +1,4 @@
+import os
 try:
     from slackclient import SlackClient
     python2 = True
@@ -17,7 +18,10 @@ class IntegrateSlackAPI(pyblish.api.InstancePlugin):
         'collect_slack_family'.
 
         Expects configured profile in
-        Project settings > Slack > Publish plugins > Notification to Slack
+        Project settings > Slack > Publish plugins > Notification to Slack.
+
+        If instance contains 'thumbnail' it uploads it. Bot must be present
+        in the target channel.
 
         Message template can contain {} placeholders from anatomyData.
     """
@@ -45,39 +49,91 @@ class IntegrateSlackAPI(pyblish.api.InstancePlugin):
 
             return
 
+        published_path = self._get_thumbnail_path(instance)
+
         for channel in instance.data["slack_channel"]:
             if python2:
                 self._python2_call(instance.data["slack_token"],
                                    channel,
-                                   message)
+                                   message,
+                                   published_path)
             else:
                 self._python3_call(instance.data["slack_token"],
                                    channel,
-                                   message)
+                                   message,
+                                   published_path)
 
-    def _python2_call(self, token, channel, message):
+    def _get_thumbnail_path(self, instance):
+        """Returns abs url for thumbnail if present in instance repres"""
+        published_path = None
+        for comp in instance.data['representations']:
+            self.log.debug('component {}'.format(comp))
+
+            if comp.get('thumbnail') or ("thumbnail" in comp.get('tags', [])):
+                self.log.debug("thumbnail present")
+
+                comp_files = comp["files"]
+                if isinstance(comp_files, (tuple, list, set)):
+                    filename = comp_files[0]
+                else:
+                    filename = comp_files
+
+                published_path = os.path.join(
+                    comp['stagingDir'], filename
+                )
+                break
+        return published_path
+
+    def _python2_call(self, token, channel, message, published_path):
         try:
             client = SlackClient(token)
-            response = client.api_call(
-                "chat.postMessage",
-                channel=channel,
-                text=message
-            )
+            if not published_path:
+                response = client.api_call(
+                    "chat.postMessage",
+                    channel=channel,
+                    text=message
+                )
+            else:
+                response = client.api_call(
+                    "files.upload",
+                    channels=channel,
+                    initial_comment=message,
+                    file=published_path,
+                )
             if response.get("error"):
-                self.log.warning("Error happened: {}".format(
-                    response.get("error")))
+                error_str = self._enrich_error(str(response.get("error")),
+                                               channel)
+                self.log.warning("Error happened: {}".format(error_str))
         except Exception as e:
             # You will get a SlackApiError if "ok" is False
-            self.log.warning("Error happened: {}".format(str(e)))
+            error_str = self._enrich_error(str(e), channel)
+            self.log.warning("Error happened: {}".format(error_str))
 
-    def _python3_call(self, token, channel, message):
+    def _python3_call(self, token, channel, message, published_path):
         try:
             client = WebClient(token=token)
-            _ = client.chat_postMessage(
-                channel=channel,
-                text=message
-            )
+            if not published_path:
+                _ = client.chat_postMessage(
+                    channel=channel,
+                    text=message
+                )
+            else:
+                _ = client.files_upload(
+                    channels=channel,
+                    initial_comment=message,
+                    file=published_path,
+                )
         except SlackApiError as e:
             # You will get a SlackApiError if "ok" is False
-            self.log.warning("Error happened {}".format(e.response[
-                                                            "error"]))
+            error_str = self._enrich_error(str(e.response["error"]), channel)
+            self.log.warning("Error happened {}".format(error_str))
+
+    def _enrich_error(self, error_str, channel):
+        """Enhance known errors with more helpful notations."""
+        if 'not_in_channel' in error_str:
+            # there is no file.write.public scope, app must be explicitly in
+            # the channel
+            msg = " - application must added to channel '{}'.".format(channel)
+            error_str += msg + " Ask Slack admin."
+
+        return error_str
diff --git a/website/docs/module_slack.md b/website/docs/module_slack.md
index c8e42ababa..de7014c203 100644
--- a/website/docs/module_slack.md
+++ b/website/docs/module_slack.md
@@ -53,3 +53,6 @@ Message could be delivered to one or multiple channels, by default app allows Sl
 to send messages to 'public' channels (eg. bot doesn't need to join the channel first).
 
 ![Configure module](assets/slack_system.png)
+
+Integration can upload 'thumbnail' file (if present in instance), for that bot must be 
+manually added to target channel by Slack admin!
\ No newline at end of file