Abstract: A cap storage and bill shape maintenance device (10) is adapted to receive the bills of a plurality of baseball or similar type caps, and to maintain the curvature of the bills of those caps. A main body (20) is formed of substantially mirror image front and back halves (30), (50) connected by a plurality of peg and socket or similar fastening structures. A plurality of generally horseshoe-shaped bill slots is defined in the main body. Two feet (70), (80) are attachable to the lower edge to support the main body in a vertical orientation. A hanger (90) attaches to a upper edge of the main body, and allows the device to be supported by the upper edge of a door, a rod in a closet, or other supporting structure. In use, by curving the bill of a cap, such as a baseball cap, the bill may be inserted into the bill slot. Time spent by the bill of the cap in the bill slot tends to overcome the resilience of the bill, allowing it to retain the rounded shape for hours.