Abstract: An illuminating balloon with an inflatable envelope and a control unit integrated in the envelope includes an electropneumatic blowing device having an intake orifice to suck air in from the outside, and a discharge orifice to send the air into the internal space of the balloon, an electronic circuit for power supply of the electropneumatic device and of the bulb, and a cover for support of the bulb and of a protective grid preventing the envelope from coming into contact with the bulb, said grid being extended up to near the top of the envelope from coming into contact with the bulb, said grid being extended up to near the top of the envelope to give the balloon rigidity.