Apparatus for sensing a lint filter of for laundry treatment machine

A lint filter detecting device of a laundry treatment device is provided to prevent laundry from being damaged or fire breaking out due to foreign materials. A lint filter detecting device of a laundry treatment device(30) comprises: a lint filter(24) filtering foreign materials within a tub; a filter mounting unit in which the lint filter is mounted; a magnetic material(32) equipped on one between the lint filter and the filter installation part; a sensor(34) sensing whether the lint filter is attached or detached by using the magnetic field; a controller determining the mount of the lint filter with a signal transmitted from the sensor; and a display unit indicating the mount of the lint filter according to the signal of controller.