Peristaltic pump for a device for extracorporeal blood treatment, comprising - a rotatable rotor driven around a rotor axis, - and comprising a pump housing with a receiving recess, in which the rotor is received, and which has a supporting surface which extends arcuately around the rotor axis and is radially spaced apart from the rotor, - wherein the supporting surface is provided for supporting a fluid line which can be positioned radially between the rotor and the supporting surface in the receiving recess and, for pumping conveyance of a fluid to be conveyed through the fluid line, can be elastically deformed in sections between the rotor and the supporting surface under the mechanical action of the rotating rotor, - and wherein the pump housing has at least one guide channel which extends between an outer side of the pump housing and the receiving recess through a housing wall of the pump housing and is provided for guiding the fluid line between the outer side and the receiving recess, - characterized in that the pump housing has an intervention protection means formed by a longitudinally curved design of at least sections of the guide channel, wherein a radius of curvature of the guide channel is matched to a channel length and a channel diameter of the guide channel in such a way that manual intervention through the guide channel into the receiving recess is prevented, - wherein the radius of curvature is at most 50% of the channel length, - wherein the channel length is between 100% and 200% of the channel diameter, and - wherein the channel diameter is between 11 mm and 13 mm, the channel length is between 11 mm and 26 mm, and the radius of curvature is between 5.5 mm and 13 mm. - a rotatable rotor driven around a rotor axis, - and comprising a pump housing with a receiving recess, in which the rotor is received, and which has a supporting surface which extends arcuately around the rotor axis and is radially spaced apart from the rotor, - wherein the supporting surface is provided for supporting a fluid line which can be positioned radially between the rotor and the supporting surface in the receiving recess and, for pumping conveyance of a fluid to be conveyed through the fluid line, can be elastically deformed in sections between the rotor and the supporting surface under the mechanical action of the rotating rotor, - and wherein the pump housing has at least one guide channel which extends between an outer side of the pump housing and the receiving recess through a housing wall of the pump housing and is provided for guiding the fluid line between the outer side and the receiving recess, - characterized in that the pump housing has an intervention protection means formed by a longitudinally curved design of at least sections of the guide channel, wherein a radius of curvature of the guide channel is matched to a channel length and a channel diameter of the guide channel in such a way that manual intervention through the guide channel into the receiving recess is prevented, - wherein the radius of curvature is at most 50% of the channel length, - wherein the channel length is between 100% and 200% of the channel diameter, and - wherein the channel diameter is between 11 mm and 13 mm, the channel length is between 11 mm and 26 mm, and the radius of curvature is between 5.5 mm and 13 mm.