PURPOSE: To obtain a high reliable printing head of which a characteristic is stabilized to be obtained without any interference between respective drive means by a method wherein a piezoelement is used for a displacement generating mechanism.
CONSTITUTION: A displacement generating mechanism B is supported by a shorter distant hinge 2 from an end part of a lever arm 1, and the displacement generating mechanism B is composed of piezoelement. In the case where a necessary character, a symbol, etc., are printed, when a signal from a control part is inputted to the piezoelement B being the displacement generating mechanism via a printed board 12, the element is elongated, and a first stage magnification of displacement is performed. The displacement acts on a projection part 4a of an armature 4, and the armature 4 is moved rotatively by taking an inner angle of an L-letter form as a fulcrum. A second stage magnification of displacement is performed by a lever ratio of this specific fulcrum and the acting point to a fulcrum and a printing wire fixed end, and the printing wire is driven.