The present invention concerns the field of individual biological protection devices against emissions of electromagnetic pollution, more particularly a biological protection device against the electromagnetic waves emitted by a mobile telephone.The device includes a frame (3) and a screen (4) made at least in part from a highly-conducting metallic material, with the screen having dimensions that are sufficient to cover the internal perimeter of the frame (3), the screen (4) and the frame (3) forming a protective element (1) that is open and proof against the electromagnetic waves, when the screen is covering the frame.The mobile telephone (2) is held within the depth of the protective element so that the screen is located facing the ergonomic interface (21) of the mobile telephone with an electrically insulating space with a thickness of at least 2 mm between the metallic part of protective element and the mobile telephone.