Abstract: A portable data player and or recorder having a door which can be easily assembled or disassembled from a casing of the disk player. The door is fitted with brackets which, in a wide open angular position of the door, can slide in a first direction along hinges of the casing up to an abutting position. In an open position a rib of the door is an abutment against a shoulder of the casing, thus preventing any disassembling of the door from the casing. Disassembling from the casing is made possible if the door is wide open. Then the shoulder does not prevent the sliding of the brackets of the door in a second direction, opposite the first one, along hinges of the casing. The invention makes it easy to change the door without any tooling, so that a user may choose the colour of the door according to their taste.