An electrical junction box for a motor vehicle is configured to prevent loss of a fuse that falls down during maintenance. Fuse-containing sections are provided on a vertical surface of a casing of an electrical junction box. The fuse-containing sections are opposed to a trim cover provided with an opening for maintenance in the motor vehicle. Fuse-receiving plates project toward the trim cover integrally on or detachably from the casing surface at the position below the fuse-containing sections. The fuse-receiving plate has a length in which a distal end contacts the trim cover or the distal end is spaced away from the trim cover by a clearance through which a fuse cannot pass. The fuse-receiving plates can receive a fuse that falls down during a fuse attachment or detachment operation.