A particulate matter detection system has a particulate matter detection sensor, a current detection part and a control circuit part. The particulate matter detection sensor has an accumulation part, a pair of electrodes and a heater part. The control circuit part performs switching of a detection mode and a burning mode. When the burning mode being switched to the detection mode, the control circuit part supplies a lower voltage between the pair of electrodes, which is lower than an usual voltage used in the detection mode, and detects a current detected by the current detection part as the offset value ΔI. In the detection mode, the control circuit part subtracts the offset value ΔI from the detected current value to correct the detected current value.