To provide an electronic light emitting element driving circuit for a lighting fixture for a vehicle for controlling two circuits provided as lighting fixtures for the vehicle for making an electronic light emitting element emit light by two kinds of brightness to impart a brightness difference and for driving the electronic light emitting element according to each of the brightness not to simultaneously operate.

This electronic light emitting element driving circuit 50 drives the electronic light emitting element 10 for the lighting fixture for the vehicle. The circuit 50 is provided with a first circuit 11 for supplying first constant current to the electronic light emitting element based on a first input signal, and a second circuit 12 for supplying second constant current having a current value different from that of the first constant current to the electronic light emitting element. The electronic light emitting element driving circuit 50 performs a switching as to whether the first circuit 11 is operated based on a potential difference between a first node n1 made as first potential Vcc when the first input signal is inputted and a second node n2 made as second potential Vcc when the second input signal is inputted.