The invention discloses an ashtray capable of preventing a kid from eating cigarette ash and cigarette ends by mistake. The ashtray comprises an ashtray base and a sealing cover plate, wherein a through hole, a cavity body and a clamping slot which are communicated with one another are formed in the ashtray base in sequence; a clamping block clamped with the clamping slot in a matched manner is arranged on the sealing cover plate; a limiting structure matched with the clamping block is arranged on the ashtray base; the limiting structure comprises a limiting ball, a limiting rod, a gear, a rack, a connection rod, an iron block, an electromagnet, a magnet, a protective cover, a supporting block and a button switch. According to the ashtray, the sealing cover plate can be taken out only by quickly pulling out the protective cover, but releasing of the button switch and pulling of the supporting block need to be carried out at the same time; if the releasing and the pulling are separately carried out, the sealing cover plate cannot be taken out; therefore, the problem on cleaning caused by the fact that the kid opens the ashtray and the potential health and safety hazard caused by mistaken eating are effectively prevented.