A hat to which an MP3 music player is connectable in the field of daily-used items is provided, which includes a hat body. An earphone is respectively disposed at two sides of the hat body. Connecting joints are disposed at outer sides of positions corresponding to human ears on the hat body. Connecting pieces corresponding to the connecting joints are disposed on the earphones. A connecting wire between the two earphones is disposed within the hat body. A slot for accommodating the MP3 music player is provided on the earphone at either of the two sides. An input plug of the earphones is disposed in the slot. The input plug is electrically connected to the earphone at the corresponding side. When the device is used, the MP3 music player can be connected to the input plug in the slot and no connecting wire is exposed outside. The earphones at the two sides can be pulled out from the connecting joints, so that only the connecting joints are left on the hat body, which is neat and clean. The MP3 music player may also be pulled out for separate use. The device is convenient to use and easy to be connected and assembled, so that the device is applicable in knit hats and baseball caps.
