To provide a content sharing system capable of preventing an editing operation in a content sharing terminal from being interrupted by an operation in other content sharing terminals, without impairing commonality of a displayed content of a shared content.

A content sharing terminal comprises: a shared content acquisition part 101 for acquiring a shared content; a shared content output part 102 for outputting the shared content to a display; an operation information generation part 103 for generating operation information on the basis of an input operation to the shared content being displayed; an editing operation state management part 104 for determining whether or not editing is in operation; and a sharing operation control part 105 for controlling the shared content output part 102 so as to apply processing based on the operation information transmitted to and received from other content sharing terminals to the shared content and re-output it, and controlling the shared content output part 102 so as not to execute displayed content change processing when the operation information showing an instruction on the displayed content change processing is acquired during the editing operation.