Abstract: A disposable ashtray includes a body made of paper and having a compartment with a top opening for receiving cigarette butts. The annular wall includes an annular flange extending outward from a top thereof. A heat-resisting layer covers an inner face defining the compartment. A top cover is mounted on the top of the annular wall. The top cover includes a crown having a central hole. The crown includes a plurality of cigarette receiving grooves. The crown further includes an annular wall extending downward from an outer peripheral edge thereof. The annular wall has an inner diameter slightly larger than an outer diameter of the annular flange. A plurality of protrusions extend inward from a lower edge of the annular wall. A first engaging groove is defined between each protrusion, the crown, and the annular wall. The annular flange is engaged in the engaging grooves.