Patent ID: 7443408

Claim:
A thermal printer, comprising: a case having a pair of side wall portions provided opposed to each other in a width direction of a recording paper; a thermal head extending in the width direction of the recording paper and having a plurality of heating elements; a head support member, which is conductive, for supporting the thermal head; a platen roller whose circumferential surface can be brought into contact with the thermal head while nipping the recording paper, and which is rotatably supported between the pair of side wall portions; a driving means for rotating the platen roller to deliver the recording paper; biasing members, which are conductive, provided between the case and the head support member, for supporting the head support member while imparting bias toward the platen roller; and a flexible substrate whose surface is provided with a wiring pattern, and which is electrically connected with the thermal head to transmit a signal, wherein a part of the biasing member extends through the flexible substrate and is grounded by fixation while being electrically connected by solder with respect to the flexible substrate.