The invention relates to a cannula system (2) for guiding a liquid, which system comprises: a cannula (7) having a hose element (9) having a front end region (11) and a rear end region, wherein a channel (10) extends from the front end region (11) to the back end region, a hollow body (8) having a front end region (15), and a connector (48) which, in a connected state of the cannula system in which the front end region (15) of the hollow body (8) is introduced into the channel (10) of the hose element (9), receives the front end region (11) of the hose element (9) and the front end region (15) of the hollow body (8) in an inner region (51) of the connector (48). In the connected state, the connector (48) exerts clamping forces on the front end region (11) of the hose element (9) and clamps the front end region (11) of the hose element (9) between the front end region (15) of the hollow body (8) and the connector (48). The invention further relates to a blood pump system (1) having a blood pump (3) and having such a cannula system (2).
