Attachment structure for electric junction box

An attaching structure for an electric junction box with a junction box body, the box body having an upper wall, lower wall, front wall and rear wall and side walls, fixed to a vehicle body through attaching portions, the box body being rupture-separated from the attaching portion during recovery of the junction box body, wherein the attaching portions are provided diagonally on the upper and lower walls of the junction box body, the attaching portions aligned diagonally relative to each other, one attaching portion projecting from the upper wall adjacent the front wall and another attaching portion projecting from the lower wall adjacent the rear wall, and one of the attaching portions, which is to be subjected to a pulling force, is provided with a rupture inducing area so that when an electric wire derived from the junction box body is pulled during recovery of the junction box body, the junction box body is rupture-separated from the attaching portion at the rupture inducing area such that only when L is a direction in which the front and rear walls are opposite, W is a direction in which both side walls are opposite and H is a direction in which the upper and lower walls are opposite, and when the box body is pulled in a direction F, at an angle from the W axis on the plane (0, 1, 1) in the three axes (L, W, H) orthogonal to each other, does an attaching portion rupture separate from the box body.