Disclosed is a solenoid valve control device provided with: a first relay (20) connected in series to a drive coil of a solenoid valve (30) between output terminals (11a, 11b) of a rectifier circuit (11); a photocoupler (31) which outputs a voltage level (GND) when a predetermined level or higher of a current flows to a contact (20a) in the first relay (20), and which outputs a voltage level (V5) when a predetermined level or higher of a current does not flow to the contact (20a) in the first relay (20); and a rectifier circuit (40) which smooths and outputs an output voltage (Va1) from the photocoupler (31). When an output voltage (Vb1) from the rectifier circuit (40) is not higher than a first threshold (Vt1), a microcomputer (1a) detects that the first relay (20) is on.
