Provided are a streaming apparatus, a streaming method, and a streaming service system using the streaming apparatus, wherein the streaming apparatus includes: a scheduler configured to generate a modified metafile by modifying a reproduction list file of a metafile; and a server socket configured to transmit the modified metafile when a metafile transmit request is received from a player by operating as a server with respect to the player. Accordingly, delay times of players are substantially the same.