A rollable sun cap having a visor (10) having a body (10a) having upper and lower outer skins (13 and 14) adapted to cover the upper and lower portions of a core material thereof and a finishing edge (16) coupled by sewing to the outer circumference of the body (10a) and a band type hair portion (20) provided on the inner circumference of the visor (10) and having male and female magic tapes (24 and 25) detachably mounted on both ends thereof, the rollable sun cap including: adhesive surfaces (13a) formed on the inner surfaces of the upper and lower outer skins (13 and 14) facing the core material and band type core materials (11) provided as the core material of the body (10a) of the visor (10).
