Trim element of a car including a device for supporting a portable electronic device

The element (1) has a support device (8) with a flap (14) rotatably movable around a rotation axis (A) between retracted and erected positions. The flap has a fixing unit (42) to fix a portable electronic apparatus (10) e.g. smartphone, so that the apparatus is turned towards a cab interior of a vehicle when the flap is in the erected position. The flap has front and rear edges (24, 26) extending opposite to front and rear edges (4, 6) of an upper surface (2). The axis is extended close to the rear edge of the flap that pivots towards the rear edge of the surface between the positions.