Infusion device, comprising: - a housing having a receptacle for receiving an infusion line, - a pump mechanism for delivering a medical fluid through an infusion line received in the receptacle, and - a clamping mechanism having a clamping element being pivotably connected to the housing about a pivot axis and being movable with respect to the housing between a clamping position for acting onto an infusion line received in the receptacle to locally pinch off the infusion line and a release position for allowing a flow through the infusion line, characterized in that the clamping mechanism comprises a base element arranged on the housing, the infusion line being received in between the clamping element 20 and the base element, the clamping element being movable about its pivot axis with respect to the base element for sliding the clamping element onto the infusion line for pinching the infusion line in between a first clamping face of the clamping element and a second clamping face of the base element in the clamping position or for sliding the clamping element off the infusion line for allowing a flow through the infusion line in the release position, wherein the first clamping face and/or the second clamping face are curved about the pivot axis of the clamping element and, wherein the clamping element comprises a body and a jaw element pivotably arranged on the body, and the jaw element being pretensioned with respect to the body by means of an elastic pretensioning element and / or wherein the base element is pivotably connected to the housing and is elastically pretensioned with respect to the housing by means of another elastic pretensioning element. - a housing having a receptacle for receiving an infusion line, - a pump mechanism for delivering a medical fluid through an infusion line received in the receptacle, and - a clamping mechanism having a clamping element being pivotably connected to the housing about a pivot axis and being movable with respect to the housing between a clamping position for acting onto an infusion line received in the receptacle to locally pinch off the infusion line and a release position for allowing a flow through the infusion line, that the clamping mechanism comprises a base element arranged on the housing, the infusion line being received in between the clamping element 20 and the base element, the clamping element being movable about its pivot axis with respect to the base element for sliding the clamping element onto the infusion line for pinching the infusion line in between a first clamping face of the clamping element and a second clamping face of the base element in the clamping position or for sliding the clamping element off the infusion line for allowing a flow through the infusion line in the release position, wherein the first clamping face and/or the second clamping face are curved about the pivot axis of the clamping element and, wherein the clamping element comprises a body and a jaw element pivotably arranged on the body, and the jaw element being pretensioned with respect to the body by means of an elastic pretensioning element and / or wherein the base element is pivotably connected to the housing and is elastically pretensioned with respect to the housing by means of another elastic pretensioning element.