PURPOSE: To perform pulse train recording which can be formed into an one- chip IC with a simple circuit configuration, by successively controlling plural switching circuits in accordance with serial data, in which data to be added to each head are successively arranged, and making an electric current of a direction corresponding to data flow successively to each head for a prescribed period.

CONSTITUTION: Clocks 1 and 2 and a pulse width setting pulse Ps are added to each terminal 4, 5, and 6 and data D0 are added to a terminal 7. The data d0 are serial data, in which data to be successively recorded by heads 11W14 are successively arranged and synchronized to the clock 1. The cycle of the clock 2 represents the one cycle of the serial data D0 and is added in a rate of one piece to four pieces of the clock 1. The pulse Ps is to determine the pulse width of a pulse current +I or -I to be made to flow to each head and synchronized to the clock 1. It is possible to make to flow a pulse-like current +I or -I of positive or negative polarity shown by gWt of the diagram to each head 11W14 in accordance with the "H" and "L" of the data D0.