Disclosed herein is a peristaltic pump for medical applications comprising a motor, a rotor coupled to the motor, a housing in which the rotor is arranged and an opening and closing mechanism comprising a tube pressuring portion, a slider and a pivotable cover coupled to the housing and the slider. The opening and closing mechanism is accentuated by the pivotable cover, which pivotable cover is connected to the tube pressuring portion via elastic elements. The elastic elements are thereby connected via at least one adjustable element so that the tension or pretension in the elastic element can be adjusted to tube types and material, to the viscosity of the pumped fluid and to the amount of fluid that needs to be pumped.