To provide the grinding conclusion detector of a disposer capable of accurately and stably delecting the grinding conclusion of garbage, and the disposer equipped therewith.

The grinding conclusion detector of the disposer is constituted so as to grind garbage by a grinding mechanism 4 cooperating with a drive motor 3 to discharge the ground garbage along with supplies water and equipped with a multiplication circuit 120 for multiplying the current and voltage supplied to the drive motor 3 to calculate power at the time of grinding and a decision circuit 150 for comparing the power at the time of grinding with a reference value of power at the time of conclusion of grinding of the drive motor 3 and deciding the conclusion of grinding when the power at the time of grinding is less than the reference value, A light emitting diode 152, which reports the conclusion of grinding when the conclusion of grinding is detected, is provided.