To provide a device for detecting resin clogging which solves such a problem that the detection of the resin clogging for each of a plurality of air vents provided in a mold is difficult.

The device for detecting the resin clogging includes: a detecting part having pressure sensors 1A-1B which detect the pressure loaded on each of a plurality of pipes connected to each of the plurality of the air vents provided in a cavity 21; a data collecting part 2 for monitoring the temporal change of each pressure and obtaining a plurality of status values showing the state of each air vent based on each of the temporal change; an abnormality determining and control part 3 for determining whether a resin is clogged to the air vent for each air vent or not based of the plurality of the status values; and a monitor 4.