A fast locking device for at least one tool (9) on at least a guide element (8) comprising:a fixing element (2) provided with at least one first opening (29) for the through-passage of at least one tool (9)a base (3) removably lockable to the fixing element (2), via clutch means, provided with a stop surface (31), opposite to the fixing element (2), at an end of which there is a locking element (38) to at least partially engage the guide element (8)a hook-like element (4) revolvingly locked to the base (3) between a release condition (A) and a locking condition (B) for the guide element (8)a cursor element (7) sliding internally to the fixing element (2) and to the base (3) and provided with at least one second opening (79) and one hollow (74) which engages a projection (47) present on the hook-like element (4)a locking means (6) which internally engages the cursor element (7) and is provided with an inner end (69) that leads to the inside of the first opening (29) and of the second opening (79) and abuts the tool (9)at least one elastic element (39) interposed between the base (3) and the fixing element (2) which counters their mutual approach.
