A track maintenance machine (1) consists of an end side on-track undercarriages (4) supported on the machine frame (5). On regard to a working direction (6) of the machine rear end (22) is arranged a clearing device (7). This has an underneath a track (3) located ballast receiving unit (23) and a working direction with respect to the rear discharge end (17) for transferring the received ballast (2) on a conveyor belt (18). The rear on-track undercarriage (4) is of a between the discharge end (17) and ballast receiving unit (23) of the clearer means (7) located transfer position in the direction displaceably mounted on the machine frame (5) to the front on-track undercarriage (4).
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