A side cover of a car for a high-speed train comprises: a base frame; a partial cover part; and a locking part. The base frame covers a car part of the high-speed train and has a plurality of minute holes formed on the inner surface thereof facing the car part. The partial cover part is formed on the base frame to open/close a part of the base frame and is opened according to movement of an interference leading body located in the car part. The locking part is fixed to an edge of the base frame, thereby improving fixing force between the base frame and a chassis.
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