A breast pump according to the present invention comprises: a fastening housing, which is fastened to a breast of a lactating woman, which has a protrusion formed in a part corresponding to a nipple of the lactating woman so as to extend forwards, and which has a milk discharge hole formed on the bottom surface of the protrusion near the end thereof a cap connector coupled in such a structure that the end side of the protrusion is covered, a spacing space being provided between the same and the end surface of the protrusion, and the cap connector having a milk outflow tube extending downwards from the lower end of the milk discharge hole so as to communicate with the spacing space a funnel connector provided on the upper side of the cap connector so as to have a concavely formed upper surface, thereby having an inner space, the funnel connector having a communication channel via which the inner space and the spacing space communicate with each other a cover coupled so as to cover the inner space of the funnel connector a flow isolation membrane for isolating the space between the funnel connector and the cover into upper and lower spaces and an air tube via which air flows into/out of the space between the cover and the flow isolation membrane.Une pompe tire-lait selon la présente invention comprend : un boîtier de fixation, qui est fixé à un sein de femme en lactation, qui possède une saillie formée dans une partie correspondant à un mamelon de la femme en lactation de manière quelle sétende vers lavant, et qui présente un trou dévacuation du lait formé sur la surface inférieure de la saillie à proximité de lextrémité de celle-ci un raccord de capuchon accouplé selon une structure telle que le côté dextrémité de la saillie soit recouvert, un espace despacement étant prévu entre celui-ci et la surface dextrémité de la saillie, et le raccord de capuchon comprenant un tube de sortie du lait sétendant vers le bas à partir de lextrémité inférieure de lorifice dévacuatio
