To provide an interior trim part for a vehicle without maximally imparting reaction force to an occupant, even when strong load is applied from the occupant to a vehicle trim by a side collision.

This interior trim part is provided with an arm rest part 3 projecting to a cabin side, a box body 6 provided in the arm rest part 3 and a lid 5. The interior trim part is provided with an impact absorbing part 7 for absorbing impact due to crushing of a side surface of the box body 6 when load from a vehicle side part is imparted to the arm rest part 3. The impact absorbing part 7 is made of a material having an Izod impact value in the range of 5.0-25.0 KJ/m2.