To provide a wide angle projection type video display device that can be easily and exactly installed when it is to be set and installed and can automatically correct trapezoidal distortion.

The projection type video display device includes: a body case 1a; a projection lens 3 using a short focus lens; an aspherical reflection mirror 4 reflecting projection light R from the projection lens 3 toward a projection surface; a plurality of bar-like protrusions 5 protruding toward a wall surface Z from the body case 1a; a protrusion driving part that makes the protrusions 5 advance and retreat; and an operation part that performs running operation of the device. The plurality of protrusions 5 comprise at least three protrusions so as to form a fixed plane by all their edge surfaces, and are constituted to protrude by an initial set dimension L set in the operation part when the device is set and installed.