Patent attributes
In an electric connection box, first and second holding structures between a casing and a terminal block outside the casing include locking portions provided on the side of an assembly surface of the casing, locked portions provided on the side of the terminal block and in which a relative movement of an installation target toward the side of an opening at an assembly completion position is locked by the locking portions, guide portions provided on the side of the assembly surface and extend along a direction of the relative movement between the locking portions and the locked portions in a state where the casing is attached to the installation target, and guided portions provided on the side of the terminal block and are guided from the side of the opening to the assembly completion position along the guide portions, respectively.