The present invention provides a probe cover for ear thermometer including a conical body, a ring-shaped elastomer, a flange, and a plurality of convex rib structures. The conical body includes a closed end and an opened end. The ring-shaped elastomer is connected with the opened end of the conical body. The flange is connected with the ring-shaped elastomer. The ring-shaped elastomer is located between the conical body and the flange. The flange includes a first surface and a second surface. The plurality of convex rib structures are spaced disposed apart on the flange and protruded to the first surface. Therefore, the present invention can increase the convenience of disassembling the probe cover.本發明公開一種耳溫槍用探頭套,其包括一錐形本體、一環形彈性體、一凸緣及多個凸肋結構。錐形本體具有一封閉端及一開口端。環形彈性體連接於錐形本體的開口端。凸緣連接於環形彈性體。環形彈性體位於錐形本體與凸緣之間。凸緣具有一第一表面及一第二表面。多個凸肋結構間隔地設置在凸緣上且相對於第一表面呈凸出狀設置。藉此,本發明能增加探頭套的拆裝上的便利性。