Rectangular cable holder, comprising the following features or components: a U-shaped frame comprising two legs (1.1, 1.2) and a connecting piece (1.3) interconnecting said two legs; a number of grommets, each of which comprise at least one hole (4.2) for guiding a cable through; a U-shaped bar, which likewise comprises two legs (2.1, 2.2); the bar can be slid onto the frame, such these two components form a unit; the bar or the frame, or both, consist of resilient material; the legs (2.1, 2.2) of the bar and the legs (1.1, 1.2) of the frame comprise recesses and projections, respectively, characterised by the following features: the projections on one of the two parts can be latched into the recesses on the other of the two parts in order to establish a snap-in connection; the bar and the legs (2.1, 2.2) thereof are symmetrical in plan view; one leg (1.1, 1.2) of the frame and one leg (2.1, 2.2) of the bar each have a pair of surfaces (1.1.1, 2.1.1; 1.2.1, 2.2.1), the surfaces of which abut one another when joined together; the pairs of surfaces are formed by a lateral inner surface (2.1.1, 2.2.1) of the relevant leg (2.1, 2.2) of the bar and a lateral outer surface (1.1.1, 1.2.1) of the relevant leg (1.1, 1.2) of the frame; the pairs of surfaces (1.1.1, 2.1.1 and 1.2.1, 2.2.1) are inclined relative to one another; the lateral inner surfaces of the legs (2.1, 2.2) of the bar comprise the projections and the lateral outer surfaces of the legs of the frame comprise the recesses. a U-shaped frame comprising two legs (1.1, 1.2) and a connecting piece (1.3) interconnecting said two legs; a number of grommets, each of which comprise at least one hole (4.2) for guiding a cable through; a U-shaped bar, which likewise comprises two legs (2.1, 2.2); the bar can be slid onto the frame, such these two components form a unit; the bar or the frame, or both, consist of resilient material; the legs (2.1, 2.2) of the bar and the legs (1.1, 1.2) of the frame comprise recesses and projections, respectively, characterised by the following features: the projections on one of the two parts can be latched into the recesses on the other of the two parts in order to establish a snap-in connection; the bar and the legs (2.1, 2.2) thereof are symmetrical in plan view; one leg (1.1, 1.2) of the frame and one leg (2.1, 2.2) of the bar each have a pair of surfaces (1.1.1, 2.1.1; 1.2.1, 2.2.1), the surfaces of which abut one another when joined together; the pairs of surfaces are formed by a lateral inner surface (2.1.1, 2.2.1) of the relevant leg (2.1, 2.2) of the bar and a lateral outer surface (1.1.1, 1.2.1) of the relevant leg (1.1, 1.2) of the frame; the pairs of surfaces (1.1.1, 2.1.1 and 1.2.1, 2.2.1) are inclined relative to one another; the lateral inner surfaces of the legs (2.1, 2.2) of the bar comprise the projections and the lateral outer surfaces of the legs of the frame comprise the recesses. the projections on one of the two parts can be latched into the recesses on the other of the two parts in order to establish a snap-in connection; the bar and the legs (2.1, 2.2) thereof are symmetrical in plan view; one leg (1.1, 1.2) of the frame and one leg (2.1, 2.2) of the bar each have a pair of surfaces (1.1.1, 2.1.1; 1.2.1, 2.2.1), the surfaces of which abut one another when joined together; the pairs of surfaces are formed by a lateral inner surface (2.1.1, 2.2.1) of the relevant leg (2.1, 2.2) of the bar and a lateral outer surface (1.1.1, 1.2.1) of the relevant leg (1.1, 1.2) of the frame; the pairs of surfaces (1.1.1, 2.1.1 and 1.2.1, 2.2.1) are inclined relative to one another; the lateral inner surfaces of the legs (2.1, 2.2) of the bar comprise the projections and the lateral outer surfaces of the legs of the frame comprise the recesses.