Printing apparatus

A printing apparatus for printing by use of a printing head on a printing medium conveyed by means of an endless conveying member comprises two roller members to support an endless conveying member tensioned around them, a first displacing unit to displace the endless conveying member in the direction different from the traveling direction of the endless conveying member, this first displacing unit being arranged to displace the portion of the endless conveying member, which faces the printing head, and a second displacing unit to displace the endless conveying member on the side opposite to the endless conveying member displaced by the first displacing unit in accordance with the displacement of the endless conveying member made by the first displacing unit. With the structure thus arranged, it is possible to make the tension exerted on the conveying belt extremely small as a whole. Hence there is no need for the provision of any particular elements to cope with comparatively large changes in the tension acting on the conveying belt, that may otherwise result in making the apparatus larger. Also, the gap between the printing head and the conveying surface of the conveying member is maintained relaibly for the execution of printing in good condition.