A continuously variable power split transmission for a combustion engine (VM), powering vehicles includes a variator (V) and a summing gear train (SG1), the variator transmits a fraction of the power with a continuously variable speed to the summing gear train (SG1) which includes four shafts, a first sun gear (S1), a second sun gear (S2), a ring gear (H1) and a number of planetary gears (P1, P2) journaled on a planet carrier (St1), wherein: The couplings (C0, C1; C0, C1, B0, B1) are incorporated in one common entry unit (E). The summing gear has first (P1) and the second planetary gears (P2) on a common planet carrier (St1), meshing with each other; the first sun gear (S1) or the first ring gear (H1) are driven in turn to create ranges; and the planet carrier (St1) of the summing gear train (SG1) is drivingly connected with the output shaft (StW1) of the transmission.