diff --git a/CHANGELOG b/CHANGELOG
index be3d76ff0f..a9f335b0a5 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Support Binary field in CSV import/export
+
 Version 6.0.0 - 2021-05-03
 * Bug fixes (see mercurial logs for details)
 * Support printing zip archive
diff --git a/tryton/gui/window/win_export.py b/tryton/gui/window/win_export.py
index 0a8775bfee..275a9adac8 100644
--- a/tryton/gui/window/win_export.py
+++ b/tryton/gui/window/win_export.py
@@ -1,5 +1,6 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
+import base64
 import csv
 import datetime
 import os
@@ -426,6 +427,8 @@ class WinExport(WinCSV):
                 val = int(val)
             if i == 0 and indent and isinstance(val, str):
                 val = '  ' * indent + val
+            if isinstance(val, bytes):
+                val = base64.b64encode(val).decode('utf-8')
             row.append(val)
         return row
 
diff --git a/tryton/gui/window/win_import.py b/tryton/gui/window/win_import.py
index 409f84d0e6..5bfe04dacf 100644
--- a/tryton/gui/window/win_import.py
+++ b/tryton/gui/window/win_import.py
@@ -1,5 +1,6 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
+import base64
 import csv
 import gettext
 import locale
@@ -208,6 +209,8 @@ class WinImport(WinCSV):
                         val = Decimal(locale.delocalize(val))
                     elif type_ in ['date', 'datetime']:
                         val = date_parse(val, common.date_format())
+                    elif type_ == 'binary':
+                        val = base64.b64decode(val)
                 row.append(val)
             data.append(row)
         try: