Thermal printer and portable terminal

A thermal printer, comprising:

• a frame;
• a platen roller, which is supported on the frame so as to be rotatable about a first direction, and includes a transmission portion configured to receive power transmitted from a drive source at an end portion on a first side in the first direction;
• a head support plate, which is supported on the frame;
• and
• a thermal head, which is fixed to the head support plate, and is configured to nip recording paper between the thermal head and the platen roller in a second direction orthogonal to the first direction to perform printing on the recording paper,
• wherein the frame includes a swing support portion configured to support the head support plate so that the head support plate is swingable about the first direction and a third direction orthogonal to the first direction and the second direction,
• wherein the thermal head is fixed to a portion of the head support plate located on a first side in the third direction with respect to the swing support portion, and
• wherein an urging member configured to urge the head support plate in a direction of causing the thermal head to approach the platen roller is interposed between a portion of the head support plate located on a second side in the third direction with respect to the swing support portion, and the frame.