Condenser unit for a roof-mounted air conditioning system of a road vehicle, - having a condenser which has several condensation tubes extending parallel to one another in a longitudinal direction of the condenser, which on their longitudinal ends are connected with a first collector tube of the condenser and with a second collector tube of the condenser, which extend at the respective longitudinal end of the condenser in each case in a transverse direction of the condenser, - having a support for fastening the condenser unit on a vehicle roof, which has a first bearing area, assigned to the first collector tube, on which the first collector tube bears, and a second bearing area, assigned to the second collector tube, on which the second collector tube bears, characterised in - that the condenser unit has a fan shroud, which defines a flow channel leading from the condenser to a condenser fan, which is fastened on the support and which has a first holding area assigned to the first collector tube and a second holding area assigned to the second collector tube, - that the condenser is held by means of the fan shroud on the support, in that the first collector tube is held with the first holding area on the first bearing area, and the second collector tube is held with the second holding area on the second bearing area, - that the first bearing area, the first holding area and the first collector tube with respect to the longitudinal direction of the condenser form a fixed support for the condenser, - that the second bearing area, the second holding area and the second collector tube with respect to the longitudinal direction of the condenser form a loose support for the condenser. - having a condenser which has several condensation tubes extending parallel to one another in a longitudinal direction of the condenser, which on their longitudinal ends are connected with a first collector tube of the condenser and with a second collector tube of the condenser, which extend at the respective longitudinal end of the condenser in each case in a transverse direction of the condenser, - having a support for fastening the condenser unit on a vehicle roof, which has a first bearing area, assigned to the first collector tube, on which the first collector tube bears, and a second bearing area, assigned to the second collector tube, on which the second collector tube bears, characterised in - that the condenser unit has a fan shroud, which defines a flow channel leading from the condenser to a condenser fan, which is fastened on the support and which has a first holding area assigned to the first collector tube and a second holding area assigned to the second collector tube, - that the condenser is held by means of the fan shroud on the support, in that the first collector tube is held with the first holding area on the first bearing area, and the second collector tube is held with the second holding area on the second bearing area, - that the first bearing area, the first holding area and the first collector tube with respect to the longitudinal direction of the condenser form a fixed support for the condenser, - that the second bearing area, the second holding area and the second collector tube with respect to the longitudinal direction of the condenser form a loose support for the condenser.