[Problem] To provide a manual breast pump which can easily be assembled and disassembled for cleaning, and with which the negative pressure produced by a lever-type manipulation unit during pumping can easily be changed. [Solution] A manual breast pump equipped with: a storage container (11) for storing breast milk; a breast pump main body; and a manipulation unit (61) that is attached to the breast pump main body for the purpose of deforming a negative pressure producing member mounted on the breast pump main body. The manipulation unit (61) is in the form of a lever, and is equipped with an engaging aperture (15) that engages an engaging part (38) as the part to be engaged on the breast pump main body (21) side. The engaging aperture (15) selectively engages engaging parts provided at multiple locations along the length of an elongated part, which is raised as a support post and is one part of the negative pressure producing member.
