Abstract: An electric connection box for an automobile effectively prevents entry of water into the box and allows water entered the box to be easily discharged. The electric connection box has a base block (11) having a component-mounting surface (20) on which electric components such as relays (30) are mounted, and also has an upper cover (10) for covering the electric components. The component-mounting surface (20) is located above the lower end of a peripheral section (34) of the upper cover (10). On the outer periphery of the base block (11) is formed a first peripheral wall (31) fitting to the peripheral section (34) of the upper cover (10). The first peripheral wall (31) is located inside the peripheral section (34) of the upper cover (10). The upper end of the first peripheral wall (31) is located above the lower end of the peripheral section (34) of the upper cover (10). The component-mounting surface (20) is located above the upper end of the first peripheral wall (31).