The cannula for dispensing fluid products, particularly for rectal applications, comprises a tubular body for containing a fluid product to be dispensed which has a product dispensing mouth, obtained on the side surface of the tubular body, and at least an open axial extremity, at least a cap fittable substantially snugly around the tubular body to temporarily close the dispensing mouth, a push piston for pushing the product which is at least partially fittable in the tubular body through the open axial extremity and moving between an initial packaging configuration and a final dispensing configuration, a substantially tubular liner which is associable with the tubular body around the push piston, and temporary withholding means of the push piston in the initial packaging configuration which are placed in between the liner and the push piston.
