To provide power switch structure for a power switch with low switching frequency in simple structure and to provide a small, less expensive terminal board with switch function containing a switch in a terminal board.

This power switch is composed of a main body and a cover having an insertion hole for inserting a switching unit, and a power supply side terminal is attached to the one surface of an insulating rib installed in the main body and a power receiving side terminal is attached to the other surface of the rib to form a male part, a first locking piece having elasticity is installed in a first vertical piece, a second locking piece is installed in a second vertical piece on the inside of almost a U-shaped metal piece formed by connecting the first vertical piece and the second vertical piece to form a female part, the female part is installed in the male part to form the switching unit, and the switching unit is fit so that the first and second locking pieces come in contact with the terminals on the power supply side and the power receiving side of the male part respectively to electrically connect the power supply side terminal and the power receiving side terminal, and the switching unit is taken off to separate from the male part, or rotated clockwise or counterclockwise to a given position to conduct insertion shut off in a non-continuity sate.