PROBLEM TO BE SOLVED: To provide a breast pump effectively preventing breast milk from being leaked from a breast milk extraction part whose diameter is enlarged when extracting the breast milk or preventing the loss of a negative pressure by a leak from occurring.SOLUTION: This breast pump includes: a storage vessel 11 for storing breast milk a breast pump body generating the negative pressure for extracting the breast milk a diameter-enlarged breast milk extraction diameter enlargement part 22 for being abutted on a breast of a user and a buffer part 70 which has an almost circular trumpet shape along an opening part of the breast milk extraction diameter enlargement part, and at least a portion of which abuts on the breast of the user. The buffer part has: an abutment part abutting on an areola part of the user and a sticking part or the like sticking to a breast part.COPYRIGHT: (C)2013,JPO&INPIT【課題】搾乳時に拡径された搾乳部から母乳が漏れたり、リークによる負圧の損失を生じることを有効に防止できる搾乳器を提供すること。【解決手段】母乳を貯めるための収容容器11と、搾乳のための負圧を生成する搾乳器本体と、使用者の乳房に当接されるための拡径された搾乳拡径部22と、前記搾乳拡径部の開口部に沿ったほぼ円形のラッパ形状とされることにより、使用者の乳房に少なくとも一部が当接するようにされた緩衝部70とを有し、前記緩衝部は、使用者の乳輪部に当接する当接部や乳房部に密着する密着部等を有する。【選択図】図1
