To realize markedly improvement of circuit safety, while complication of circuit constitution is restrained.

A switching element drive control part 7 controlling a switching element of a load drive circuit part 6 to which a high voltage is applied is connected with a control circuit part 5 which communicates with the control part 7, through diodes 91, 92 for preventing a reverse current. Thereby, when a trouble is generated and an internal potential of the switching element drive control part 7 is increased abnormally, the potential does not spread to the control circuit part 5. The abnormal reverse current from the switching element drive control part 7 to the control circuit part 5 can be prevented by simple circuit constitution, so that a dual power source type load driving control circuit, in which remarkable improvement of circuit safety is realized can be realized.