The invention relates to a base module for a nutating pump and a nutating pump system. The base module for a nutating pump (40) comprises a nutating pump drive (43) a nutation device (41) a holder (42) for a pump module (1) and a pretensioning device (56) said pretensioning device (56) resiliently pretensioning the pump module (1) accommodated in the holder (42) against the nutation device (41).