PURPOSE: To transfer materials smoothly regardless of a difference in level with a skid by providing a terminal roller of a roller conveyer disposed on a transported car body in such a manner as to turn up and down in a material transfer loader in a factory or the like.

CONSTITUTION: A terminal roller 2A of a roller conveyer 2 disposed on a main body of a car body has a support shaft 6 supported in an elongated hole 11 of a car body frame 9 in such a manner as to move up and down, and the terminal roller is supported by a rotary mechanism 10 comprising an oval cam 12 and a push-up block 13. In this arrangement, when the terminal roller 2A of the main body 1 of the car body is different in height from a roller conveyer of a skid not shown, the push-up block 13 is advanced to an operating position by an actuator 14, and the cam 12 is rotated to move up and down the terminal roller 2A to be matched with the height of the skid. In this arrangement, a difference in level between the car body and the skid is eliminated to accomplish smooth transfer loading.