To facilitate a mounting work and reinforce mounting strength in a muntin type mount member of room air conditioner.

This mount member constitutes a mount by assembling an upper angle 10 and a lower angle 20 freely. An arc-shaped bending part 12 and a horizontal projecting part 13 are formed on the upper end of the upper angle 10 by bending a vertical part 11 to the front side while a slot screw hole 16 is formed, which leads to the projecting part 13 from the vertical part 11 by way of the bending part 12. An arc-shaped bending part 22 and a projecting part 23 are formed on the lower end of the lower angle 20 by bending the vertical part 21 to the front side while a long and screwed hole 26 is formed, which lead to a projecting part 23 from the vertical part 12 by way of the bending part 22. In the case when a screw is screwed through the screw holes 16 and 26, the screwing work can be simplified. The projecting parts 13 and 23 and the vertical parts 11 and 21 are firmly bonded with the mounting surface. It is, therefore, possible to prevent the angle from being floated up resultant from screwing work by slanting the upper end of the upper angle 10 and the lower end of the lower angle 20 to the rear side.