Abstract: A system for connecting a table tennis net to a table tennis table, the system including a blocking device comprising: a hollow body (12), at least one orifice (20) being arranged in said body so as to open out at a first end to the outside of the system and at a second end to the inside of the body; and a pusher (13) that is movably mounted in the body to move between a low position in which the pusher allows access to the inside of the body via the second end of the orifice, and a high position in which the pusher blocks access to the inside of the body via the second end of the orifice.