Abstract: Disclosed is a complex tester for a heat and smoke fire sensing apparatus. The complex tester includes: an oil tank filled with smoke oil, an oil heater mounted on a oil heater fastening unit and connected to a power source, a wick connected to the oil within the oil tank and the oil heater so as to supply the oil to the oil heater, a blower fan provided between the oil tank and a heater mounting unit so as to blow smoke to the outside wherein the smoke is generated as the oil is burnt by the oil heater, a heater mounted on a heater fastening plate formed from a mica plate and connected to the power source, and a bellows cover mounted on the top of the case, the bellows cover being adapted to come into close contact with the circumference of the fire sensing apparatus even if a fire sensing apparatus mounting surface is not flat or the fire sensing apparatus mounting surface and the heater mounting unit do not form a right angle, whereby the bellows cover prevents the leakage of smoke or heat to the outside.