The invention provides a semiconductor-switch control device capable of appropriately cutting the over current and protecting a circuit. The semiconductor-switch control device (1) includes a controller (40) that detects an analog signal of a load current, converts the detected analog signal into a digital signal, and determines an over-current based on the converted digital signal; a short circuit detector (50) that detects an analog signal of a load voltage, and detects an over-current based on the analog signal without converting the detected analog signal into a digital signal; and a driveunit (20) that drives an FET (10) based on a determination result of the over-current determined by the controller (40) or a detection result of the over-current detected by the short circuit detector (50).