To provide an electric pole installation device which assists the work at an upper portion of the electric pole to enable a worker to concentrate on the work without a fear of falling by hanging a tool bag with high reliability by using an existing portion without providing a portion for hanging the tool box or the like for each work site.

This electric pole installation device has: an attachment device 11 for attaching a flat surface of a hanger seat of a transformer so as to be sandwiched between a skirt portion 13 interlocked with an outer surface portion 12 and a pressure grip piece 14; and a bar-shaped member 12 standing at the outer surface portion of the attachment device. The top end portion 21b of the bar-shaped member circulates and rises in a horizontal direction to cross with the extending direction, what is called, is formed into a pig tail shape.