To provide a nipple covering member and a breast Pump, with which breast milk can be effectively collected.A pad (12) of a breast Pump (10) compirses: a cylindrical frame (25), on one end side thereof, a large diameter side opening poriton (12A) for inserting a nipple is formed and, on the other end side, a small diameter side opening portion (12B) is formed a first soft portion (34) which is provided in part in the circumferential direction, between the large diameter side opening portion (12A) and the small diameter side opening portion (12B), of the cylindrical frame (25) and a second soft portion (36) which is provided, at the position opposing the first soft portion (34), independently from the first soft portion (34). The first soft portion (34) is deformable toward the inside of the cylindircal frame (25) by the pressing force from the outside of the pad (12) and the second soft poriton (36) is deformable toward the outside of the cylindrical frame (25) by the pressing force from the inside of the pad (12).獲得一種能有效地進行母乳之採取的乳頭覆蓋構件以及搾乳裝置。搾乳裝置(10)的襯墊(12)係具備:筒狀框架(25),其在一端側形成用以插入乳頭的大徑側開口部(12A),並且在另一端側形成小徑側開口部(12B);第1柔軟部(34),其設置在筒狀框架(25)之大徑側開口部(12A)和小徑側開口部(12B)之間的周圍方向之一部分;以及第2柔軟部(36),其在面對第1柔軟部(34)的位置上,設置成獨立於前述第1柔軟部(34)。第1柔軟部(34)係可藉由來自襯墊(12)外側的按壓力而朝向筒狀框架(25)內部而變形,而第2柔軟部(36)係可藉由來自襯墊(12)內側的按壓力而朝向筒狀框架(25)外部而變形。10‧‧‧搾乳裝置12‧‧‧襯墊(乳頭覆蓋構件)12A‧‧‧乳頭插入側開口部12B‧‧‧連結側開口部18‧‧‧蠕動機構(刺激手段)20‧‧‧乳頭支撐機構(乳頭支撐部、支撐位置調整手段)25‧‧‧筒狀框架25A‧‧‧窄縮形狀部25B‧‧‧直管部25C‧‧‧骨骼部32‧‧‧矽膠(彈性構件)34‧‧‧第1柔軟部(第1之柔軟部)36‧‧‧第2柔軟部(第2之柔軟部)40‧‧‧第1臂部42‧‧‧第2臂部44‧‧‧第3臂部46‧‧‧第1刺激部52‧‧‧第2刺激部58‧‧‧第3刺激部64、66、68‧‧‧凸輪74‧‧‧支撐工件(乳頭支撐構件)