A kind of elastomer bottle cap with air hole, the surrounding wall extended downwardly comprising a roof and one by the roof periphery. The roof includes a perforative air hole. The surrounding wall includes that the bottleneck card slot of the what inner peripheral surface is circumferentially arranged in an inner peripheral surface and one. The roof and the surrounding wall have elasticity. The utility model allows the extraneous air circulation in bottle through the air hole, to keep gas permeability, and using the bottleneck card slot steadily inlay card what culture bottle, and has obturation effect good and can the advantages of just what culture bottle stacks.一種具有透氣孔的彈性體瓶蓋，包含一頂壁及一由該頂壁周緣向下延伸的圍繞壁。該頂壁包括一貫穿的透氣孔。該圍繞壁包括一內周面及一環繞地設置於該內周面的瓶口卡槽。該頂壁及該圍繞壁具有彈性。本新型透過該透氣孔讓外界與瓶內的空氣流通，以保持透氣性，並利用該瓶口卡槽穩定地嵌卡於培養瓶，而有密閉效果良好及可便於培養瓶堆疊的優點。
