Valve for a compartmentalized tyre, which has a body (1) having an end (1A) for being coupled to an inflation/deflation system (50) of the compartmentalized tyre; a second end (1B), opposite the first end, for being coupled to an inflation/deflation duct (3) of the compartmentalized tyre; a flow channel (1C) between the first end (1A) and the second end (1B). The valve has two cavities in the interior of the body (1) of the valve - the cavities have devices for connecting to chambers of the tyre; a communication channel (1D) between the first cavity (14) and the second cavity (15); an opening/closing element (172) formed by: an opening/closing cover (12) of the flow channel (1C); a connection/disconnection separator (17) of the communication channel (1D).