A method for adjusting an electrical length of a coaxial cable and a plug connector with an adjustable length that facilitates the adjustment of the electrical length of the cable are disclosed. With the method, both ends of the coaxial cable are terminated with a respective coaxial plug connector wherein at least one of the plug connectors has an adjustable length. One of the coaxial plug connectors is connected with a phase measurement device, and the other coaxial plug connector having the adjustable length is electrically shorted with a short-circuit plug. A pressing force is applied in an axial direction between the short-circuit plug and an outer conductor of the coaxial plug connector, until the phase measurement device indicates that the electrical length has reached a predetermined value.