ELECTRICAL CONNECTION BOX AND WIRE HARNESS

An electrical connection box (1) includes: a housing (11); and a lower cover (13) that closes a lower part of the housing (11), in which the housing (11) includes an electric wire bundle holder (11D) whose lower side open so as to be able to allow insertion of a bonder cap (16A) of an electric wire bundle (16) in a state where the electric wire bundle (16) is covered with the bonder cap (16A), the lower cover (13) includes a deep bottom part (13Aa) having a drainage hole (13C); and a shallow bottom part (13Ab) located above the deep bottom part (13Aa) below the electric wire bundle holder (11D), with the shallow bottom part (13Ab) being formed to include an inclined surface (13Aba) inclined downward toward the deep bottom part (13Aa), and a state where the bonder cap (16A) is inserted into the electric wire bundle holder (11D) is maintained on the inclined surface (13Aba) of the shallow bottom part (13Ab) on the lower cover (13).