A terminal box for a solar battery module is provided with a plurality of terminal plates (30) juxtaposed on a base plate (11) and connectable with positive and negative electrodes of the solar battery module, cables for external connection connectable with the terminal plates (30), and rectifying-device units (50) each of which spans between two corresponding terminal plates (30). Each rectifying-device unit (50) includes a bypass diode (52) connectable with the two corresponding terminal plates (30) to prevent an inverse current, and a metal-made clip (53) for resiliently holding the bypass diode (52). The clip (53) is held in contact with a heat discharging plate (55) of the bypass diode (52) to discharge heat generated by the bypass diode (52).