An electric junction box to prevent stress from working at a junction of conductive pattern of a connector terminal mounted on a printed wiring board and curtail its size, comprises, a printed wiring board, a connector including a terminal connected with a conductive pattern on the printed wiring board, and a connector housing accommodating the terminal, and a cover adapted to receive the printed wiring board therein and including a hole disposed on an outer wall of the cover and passing the connector therethrough. The lower cover is provided with a support adapted to overlap with a part of an edge of the connector housing surrounding the terminal, and position the part between the printed wiring board and the support.