diff --git a/aiogram/types/inline_keyboard.py b/aiogram/types/inline_keyboard.py
index 195c1e67..19e34442 100644
--- a/aiogram/types/inline_keyboard.py
+++ b/aiogram/types/inline_keyboard.py
@@ -23,6 +23,7 @@ class InlineKeyboardMarkup(base.TelegramObject):
 
         conf = kwargs.pop('conf', {}) or {}
         conf['row_width'] = row_width
+        self.other_kwargs = kwargs
 
         super(InlineKeyboardMarkup, self).__init__(**kwargs,
                                                    conf=conf,
@@ -80,6 +81,17 @@ class InlineKeyboardMarkup(base.TelegramObject):
             self.add(button)
         return self
 
+    def __iadd__(self, other):
+        return self.add(other)
+
+    def __add__(self, other: self.__class__):
+        return self.__class__(
+            inline_keyboard=self.inline_keyboard + other.inline_keyboard,
+            row_width=self.row_width,
+            conf=self.conf,
+            **self.other_kwargs
+        )
+
 
 class InlineKeyboardButton(base.TelegramObject):
     """
diff --git a/aiogram/types/reply_keyboard.py b/aiogram/types/reply_keyboard.py
index 17b0a353..bf18cce5 100644
--- a/aiogram/types/reply_keyboard.py
+++ b/aiogram/types/reply_keyboard.py
@@ -100,6 +100,16 @@ class ReplyKeyboardMarkup(base.TelegramObject):
             self.add(button)
         return self
 
+    def __iadd__(self, other):
+        return self.add(other)
+
+    def __add__(self, other):
+        return self.__class__(
+            keyboard=self.keyboard + other.keyboard, resize_keyboard=self.resize_keyboard,
+            one_time_keyboard=self.one_time_keyboard, selective=self.selective,
+            row_width=self.row_width
+        )
+
 
 class KeyboardButton(base.TelegramObject):
     """