Abstract: An ashtray includes a peripheral wall and a bottom wall together defining a compartment. A sealing plate having a melting point below 200° C. is mounted to an inner periphery of the peripheral wall and separates the compartment into an open space and a sealed space. A burning cigarette can burn through the sealing plate such that a burning end of the cigarette can enter the sealed space that lacks oxygen. Thus, the cigarette can be put out immediately to avoid injury to the human body.