To provide an electrical circuit control protector which can simplify a component structure interlocking with a whole of a power source control switch and make it easy to assemble and reduce manufacturing cost and extend a service life of the power source control switch, and as a result reduce a consumer's expense.

A push button is pushed to rock an interlocking rod synchronously and a contact piece is pushed and pulled to spring and form an on/off status in a electric circuit. A locking hole is provided on the push button and an extension groove is provided on the locking hole and one end of the interlocking rod is coupled movably with the contact piece and the other end of the interlocking rod is coupled movably with the locking hole on the push button, and when the push button is at a conductive position (ON), the extension groove of the locking hole provides a free moving space at the other end of the interlocking rod. When the circuit is conductive (ON) and at a time of a current overload when the contact piece is deformed by heat to spring out in an opposite direction, the contact piece pushes the interlocking rod to move and does not receive an interference of the push button and spring out smoothly to form a complete disconnection (OFF) status of the electric circuit, and safety of electricity usage is secured.