To provide a breast cup having natural and soft feeling of wear improved in sense of incompatibility, tightness and hardness, and also formability to the breast shape, and to provide a lady's garment using the breast cup.

This breast cup is so designed that on the front side of a polyurethane foam 8 formed in an almost bowl-like shape and excellent in stretchability, a stretch-restraining fabric 9 made of a single fabric of a knitting or a textile having stretchability slighter than that of the polyurethane foam 8 is set from the vicinity of the upper side part 2 of the breast cup through the vicinity of the side and the vicinity of the lower part to the vicinity of the front central side, and the rim 10 of the stretch-restraining fabric 9, corresponding to the central side of the breast cup is not sewn to the polyurethane foam 8, but the rim E-D, the rim along E-A line (two parts of the vicinity of E side and the vicinity of A side of the E-A line), and the rim corresponding to the hollow side of the breast cup each of the fabric are each sewn to the polyurethane foam 8 with a sewing line 11 along the vicinity of each of the rims.