PURPOSE: To provide a printer device, which can give comparatively larger feeding force to recording paper without making the diameter of a platen larger.

CONSTITUTION: The printer device concerned is equipped with a platen 9, a thermal head 52, which is mounted through ink film 54 in opposition to the platen 9, and pinch rollers 10 and 11, which give running force to the recording paper 1 feeding towards the platen 9 together with the platen 9. The platen 9 consists a main roller 5, which has a comparatively larger diameter and is mounted so as to oppose to the thermal head 52, a pair of auxiliary rollers 7 and 8, which are mounted on both the sides of the main roller 5 and parallel to the main roller 5, and an endless belt 6, which is windingly mounted round the main roller 5 and the auxiliary rollers 7 and 8.