Disclosed is a retaining frame for retaining plug connector modules and for installation in plug connector housings or for screwing onto wall surfaces, wherein the plug connector modules are inserted in the retaining frame, and retaining means on the plug connector modules interact with cut-outs or recesses provided on opposite wall parts (lateral parts) of the retaining frame. According to the disclosure, the retaining frame is designed in two halves connected to one another in an articulated manner and the cut-outs or recesses for retaining the plug connector modules are designed as openings in the lateral parts of the retaining frame. The retaining frame for inserting the plug connector modules is opened and subsequently closed, wherein the plug connector modules are held form-fittingly in the retaining frame via the retaining means on the plug connector modules.