<p>The present invention relates to a mobile robot apparatus which comprises: a robot which is mounted at the top of a cart through a support body; a controller which controls the operation of the robot; a cart which can move by mounting the robot and the controller; and a joint connector which is placed for signal/power cable joint to the robot and the cart. Therefore, the mobile robot apparatus can assemble the robot at a correct position on a cart mounting plate and can conveniently connect the signal/power cable of the robot and the controller.</p>
