Abstract: It is described a portable equipment for providing a user with air purified from solid and/or gaseous polluting substances, comprising at least: —a housing (1) to be worn by the user (for example hanging from his/her belt), containing at least filtering means (2) for detaining the polluting substances which are present in the air and means (3) for sending to delivery means (5) the air coming out from the filtering means (2); —means (6) connecting the housing (1) to the delivery means (5), and —the delivery means (5) to be applied on the head of the user and comprising at least a diffuser (7) for conveying the filtered air to the nose and mouth of the user (thus creating an area filled with clean air) and supporting means (8) for the diffuser (7). The equipment has limited size and weight and can be easily carried by the user without limiting his/her free movements.