The invention provides a roller coaster device, which comprises a plurality of train units which are sequentially connected, wherein the train units comprise a frame, wherein the frame is horizontallyarranged; a bridge frame, the bridge frame is arranged at the front end of the frame and is connected with the frame, the bridge frame comprises concave'-shaped connectors, two ends of each connectorare respectively provided with a vertical shaft, and the vertical shaft is used for being connected and fixed with a gear train; a tail seat, the tail seat is arranged at the central position of thetail part of the frame, a gear train which is consistent with the vertical shaft is fixed on the tail seat, the tail seat is used for mounting a spherical hinge connector, and the tail seat is connected with a plurality of train units through the spherical hinge connector. The roller coaster device has the advantages of simple structure, easy realization, capability of improving the integral stress intensity of the roller coaster, capability of respectively keeping independent rotation angles of the gear train in the direction changing or track changing process, ensuring uniform stress distribution of the gear trains, enabling the roller coaster to run on the tracks with sufficient degrees of freedom, so that the driving safety and the service life of the roller coaster device are furtherimproved.