Abstract: A head-mounted MP3 player usable during sports has a head-mounted sports device, an MP3 module, a fixing device, and at least an earphone. The MP3 module is fixed by the fixing device on the head-mounted sports device such as a hat, a sun-hat, a hard helmet, a soft helmet, a head band, a hair ring, a headscarf, a swimming hat, or a diving helmet. The earphone is electrically connected to the MP3 module via a signal cable. The MP3 player can thus be fixed on a user's head. When the user exercises, the MP3 module can be worn on his head with the head-mounted sports device. Moreover, the MP3 module won't fall to cause its damage during sports.