Abstract: A submammary dissector for providing a submammary pocket by insertion through an incision in a person's axilla the dissector having a curved portion at one end thereof and a handle portion at an opposite end thereof. A handle having a first grip is provided on the handle portion. The curved portion is provided with a rounded smooth tip and a dissecting notch. The upper surface of the curved portion and an intermediate portion of the dissector extending towards the handle portion are flat to provide a cleaving-like action which separates the breast at the level of the superficial fascia from the deep fascia of the underlying muscle. The undersurface of the dissecting instrument is round and smooth so that it may pass freely in the submammary space over the deep fascia of the pectoral muscle. Preferably, the curved portion is slightly tapered inwardly from the intermediate portion to the rounded tip.