PURPOSE: To enable a material supply device to cope even with a speed increase in supply by preventing vibration at supply time, and also securing a smooth carry.

CONSTITUTION: A slider 6 of a supply shuttle 4 is movably gripped by and supported with a guide rail 2 positioned on a base stand 1. A rack 7 where a tooth 8 is carved on an under surface is fixed to the supply shuttle 4, and this rack 7 meshes with a pinion 11, and at the same time, the pinion 11 also meshes with a fixed rack 17 where a tooth 18 is carved on an under surface fixed to the base stand 1. The pinion 11 is connected to an extensible- contractible rod 14 of a fixed cylinder 16 fixed to the base stand 11, and the extensible-contractible rod 14 extends and contracts in the moving direction of the supply shuttle 4 in parallel to the guide rail 2. The rack 7 and the fixed rack 17 mesh with each other so as to sandwich the pinion 11 from above and below between them, and have a length and the positional relationship to always mesh with the pinion 11 moved by extension and contaction of the extensible-contractible rod 14.