TRANSPORT REFRIGERATION UNIT

This transport refrigeration unit comprises: a casing; an electric box which is disposed inside the casing and in which electric equipment is housed; and a heat sink having a cooling plate disposed along a to-be-cooled surface of the electric box and a plurality of fins that protrude from the cooling plate and that are arranged so as to extend along the cooling plate. The casing has a refrigeration inlet port which is disposed so as to oppose the to-be-cooled surface and to interpose, together with the to-be-cooled surface, the heat sink therebetween and which enables introduction of air to the inside.