There is provided an electric connection box, including: a terminal mounting portion which includes a connection portion and a fastening portion provided on the connection portion; a metal terminal slid to be held and fixed between the connection portion and the fastening portion; a pair of restricting walls which are upstandingly provided on the connection portion, and abut respectively against opposite side edges of the metal terminal to restrict the rotation of the metal terminal; a retaining rib which is disposed on a surface of the connection portion and projects from the surface; and a retaining groove which is formed in the metal terminal, and is engaged with the retaining rib to prevent the metal terminal from being disengaged from the connection portion.