Abstract: The video camera recording and/or play-back device according to this invention is constructed with plastic chassis and further provided with many mechanisms for assembling with case. This device is provided with two ring gears for guiding the tape to the revolving head cylinder, and a spaced portion penetrating the chassis in the vicinity of the location that the head cylinder is installed, the two ring gears are easily assembled by inserting the lower ring gear through the spaced portion and then placing the upper ring gear on the lower ring gear. In this device, at least one ring gear is made of plastic and provided with a mechanism preventing excess load to the ring gears.