To provide an electric connection box for preventing water droplets adhering onto a ceiling wall of a case due to dew condensation from falling onto electric components.
The electric connection box 1 includes a case 1a for storing multiple electric components 18. The case 1a includes a case body 3 and a cover 4. The case body 3 includes a wall 32 as the "ceiling wall"; walls 30, 33, 34 as "sidewalls" to cross with the wall 32; and a wall 31 as a "bottom wall" to face the wall 32. Multiple grooves 5 are arranged on an inner surfaces 32a of the wall 32, which are extended toward the wall 30 as the "specified sidewall" and also gradually reduced in width and cross-section area as approaching the wall 30. Cross-section shapes of the grooves 5 are formed to be triangular.
IWAI TOSHINORI
Sadao Matsumura
Fumio Takino