PURPOSE: To uniformly press a printing head and prevent a spring from being missed when replacing a head or being deteriorated, by a construction wherein a carriage part for supporting a printing head thereon is formed of an elastic resin, and a spring piece for pressing the head against a recording paper is integrally provided at a part of the carriage part.

CONSTITUTION: The carriage part 3 for rotatably supporting a head holder 1 fitted with the printing head 2 consists of an elastic resin molded article, and the spring piece 3c is integrally molded on a slide part 3b of the carriage part 3. The spring piece 3c exertes a force P on a rear projection 1b of the head holder 1, thereby providing the head 2 with a pressure required for printing.