The utility model relates to the technical field of railway passenger trains and discloses a sleeping car of a railway passenger train. The sleeping car can be of open style or compartment type and comprises side walls, partition walls, and parallel tandem beds; each line of tandem beds consists of at least two sleeping beds which are spliced with each other; each sleeping bed comprises an upper-deck bed and a lower-deck bed, and a partition wall is arranged between two neighboring beds; the length directions of the tandem beds are the same with the length direction of the railway passenger train; the tandem beds at the two sides are respectively fixed with the side walls; and a corridor is arranged between the two lines of tandem beds. With such structure, the sleeping car of the railway passenger train is even in weight distribution and the passengers can have good comfort when sitting on the beds.
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