A tilt switch includes an insulated housing with two housing halves cooperatively defining an accommodation chamber and a plurality of positioning grooves formed in a surface of at least one housing half around the accommodation chamber. A plurality of conductive terminals are sandwiched between the housing halves. Each conductive terminal has a plate member positioned in a respective positioning groove, and a contact portion extending into the accommodation chamber. A conductive body is disposed in the accommodation chamber and is movable between a closed circuit state that bridges the contact portions of at least two conductive terminals and an open circuit state that does not bridge the contact portions of any two conductive terminals.