A load driving device includes a power supply terminal, a ground terminal, an output terminal coupled to a load, an output transistor coupled between the power supply and output terminals, a driver circuit supplying a first control signal to turn on the output transistor and a second control signal to turn off the output transistor, a discharge circuit coupled between the control terminal of the output transistor and the output terminal, a compensation circuit that turns on when a potential of the ground terminal is at least a predetermined value to maintain a non-conductive state of the output transistor when a polarity of a power supply coupled between the power supply and ground terminals is normal, and a reverse connection protection circuit coupled between the control terminal and the ground terminal, which brings the output transistor into a conductive state when a polarity of the power supply is reversed.