This preparation set comprises a drill guide (31) comprising a bearing surface (33) intended to bear against a glenoid cavity, a passage orifice (35) intended for the passage of a guide pin (36) implanted in the glenoid cavity, and first and second guide orifices (37, 38) each opening into the bearing surface (33) and each intended to guide a drill bit (38) capable of realizing a bone bore in the glenoid cavity, the first and second guide orifices (37, 38) being inclined with respect to the extension axis of the passage orifice (35) and converging in the direction of the bearing surface (33); and a compactor (42) comprising a compaction portion (45) having a generally trapezoidal shape and intended to be impacted against the glenoid cavity so as to form a bone housing in the glenoid cavity, the compactor (42) further including a passage hole (49) extending at least partially in the compaction portion (45) and intended for the passage of the guide pin (36) implanted in the glenoid cavity.