To provide an end treating device of a facing material, cutting the facing material with a heating blade, and easily assembled in an existing forming device.

This end treating device 30 for cutting the end part of the facing material of interior material for a vehicle includes: a cutting means 31 for the facing material; and heating means 32, 33 of the cutting means 31, wherein the heating means 32, 33 are disposed to be attached and detached to and from the cutting means 31.