A medical device (100) for the instillation of medical products in droplet form is described, said device comprising a hollow cylindrical body (10) and a rod (20) slidably mobile inside the hollow cylindrical body (10) and provided with a head (21) on which a rubber washer (40) is fixed, which washer, during the sliding of the rod (20), is in contact with an inner surface of the hollow cylindrical body (10). The rod (20) is formed as two portions (22, 24) of different diameter and the device (100) further comprises a sealing bush (30) between the hollow cylindrical body (10) and the rod (20), wherein there is provided a stop (32) which prevents the passage of the portion (22) with a larger circular section of the rod (20).
