A plug-type connector for hose and/or pipe connections, including - a coupling part having a receiving opening into which a plug part with a plug shaft, which comprises a collar, is insertable in a plug-in direction, and - a radially slotted retaining clip, which is resiliently elastic at least in regions, comprises at least two latching arms (15a, 15b), is pre-assemblable on the coupling part and in a pre-assembly position assumes an insertion position for the plug part in which the plug part is insertable through the retaining clip into the receiving opening, and wherein the retaining clip in an assembly position assumes a retaining position for the inserted plug part, in which the plug part with its collar is blockable in the receiving opening in a positive locking manner by means of the retaining clip against being pulled out, whereby the basic shape of the retaining clip - when viewed in the direction of the longitudinal axis (X-X) - is realized in a U-shaped manner, wherein the legs of the U realize two pairs (15a/15b, 16a/16b) of latching arms (15a, 15b, 16a, 16b) which are located diametrically opposite one another and are arranged one behind the other in the axial direction (X-X), are each separated from one another by a slot and are resiliently elastic in both the radial and the axial (X-X) direction, wherein the first pair (15a/15b) of latching arms (15a, 15b) blocks the plug part in the retaining position in a positive locking manner against being pulled out and the second pair (16a/16b) of latching arms (16a, 16b) holds the retaining clip in a captive manner in the coupling part both in the pre-assembly position and in the assembly position characterized in that the first pair (15a/15b) of latching arms (15a, 15b) is located on a side of the retaining clip that faces the plug-in direction of the plug part when the retaining clip is situated in the insertion position and in the retaining position in the coupling part, wherein inclined surfaces (21a, 21b), which diverge in opposition to the plug-in direction of the plug part for interaction with the collar of the plug part, are situated in each case on a side of the latching arms (15a, 15b) which faces the plug-in direction of the plug part, whereby the inclined surfaces (21a, 21b) are each formed from at least two part-surfaces (T1, T2) at various divergence angles (μ1, μ2) in opposition to the plug-in direction of the plug part, whereby the legs of the divergence angles (μ1, μ2) are formed on the one hand in each case by the longitudinal axis (X-X) of the plug-type connector and, on the other hand, in each case by a straight line (G1, G2) through the respective center following the inclination of the surface (T1, T2), whereby in each case a first part-surface, which is situated in the vicinity of the free end of the respective latching arm (15a, 15b), comprises a divergence angle (μ1) that is smaller in each case than the divergence angle (μ2) of a second part-surface which is situated in each case in a central region of the latching arm (15a, 15b). - a coupling part having a receiving opening into which a plug part with a plug shaft, which comprises a collar, is insertable in a plug-in direction, and - a radially slotted retaining clip, which is resiliently elastic at least in regions, comprises at least two latching arms (15a, 15b), is pre-assemblable on the coupling part and in a pre-assembly position assumes an insertion position for the plug part in which the plug part is insertable through the retaining clip into the receiving opening, and wherein the retaining clip in an assembly position assumes a retaining position for the inserted plug part, in which the plug part with its collar is blockable in the receiving opening in a positive locking manner by means of the retaining clip against being pulled out,