Rotating joint for distributing a paint to at least a spraying gun, comprising: - A hollow shaft, which rotates around its longitudinal axis; - A high-pressure first circuit (20, 11i, 41i, 42, spraying gun) for channelling a first paint to a first spraying gun, comprising a first duct for said first paint, housed inside said hollow shaft; - A drum comprising a plurality of flanges coaxial to axis, arranged around shaft and in contact with each other, comprising: at least a first intermediate flange, in its turn comprising a first annular chamber in communication with said first duct and having a first opening suitable for receiving said first paint, which is in communication with said first annular chamber; a first end flange and a second end flange, said first intermediate flange being interposed between said first and second end flange; - Said first paint of said first high-pressure circuit being received from said first opening and being channelled to the said spraying gun through said first annular chamber and first duct; characterized in that - Said first end flange comprises a respective entrance opening for a refrigerating/cleaning liquid, said second end flange comprises a respective discharge opening of said refrigerating/cleaning liquid, and said first intermediate flange comprises a respective first connecting hole, in particular parallel to said axis; and in that - Said drum comprises a first annular end gap, obtained at least partly in said first end flange and in communication with said entrance opening of said refrigerating/cleaning liquid; a second annular end gap obtained at least partly in the second end flange which is in communication with said discharge opening of refrigerating/cleaning liquid; said first connection hole being in communication with said first gap and with said second gap; and in that - Said rotating joint comprises a low-pressure circuit (not-shown tank, 10i, 22i, 45, 47, 45, 21, 45, 47, 45, 22o, 10o, not-shown tank) allowing to channel said refrigerating/cleaning liquid from said entrance opening of said first end flange to said discharge opening of said second end flange through said first gap, said first connection hole and said second gap; and wherein - Said first annular chamber of said high-pressure circuit is interposed between said first gap and second gap along said longitudinal axis and is arranged more internally than connection hole with respect to said axis, so that said low-pressure circuit (not-shown tank, 10i, 22i, 45, 47, 45, 21, 45, 47, 45, 22o, 10o, not-shown tank) completely surrounds said annular chamber and can intercept possible undesired leakages of said first paint. - A hollow shaft, which rotates around its longitudinal axis; - A high-pressure first circuit (20, 11i, 41i, 42, spraying gun) for channelling a first paint to a first spraying gun, comprising a first duct for said first paint, housed inside said hollow shaft; - A drum comprising a plurality of flanges coaxial to axis, arranged around shaft and in contact with each other, comprising: at least a first intermediate flange, in its turn comprising a first annular chamber in communication with said first duct and having a first opening suitable for receiving said first paint, which is in communication with said first annular chamber; a first end flange and a second end flange, said first intermediate flange being interposed between said first and second end flange; - Said first paint of said first high-pressure circuit being received from said first opening and being channelled to the said spraying gun through said first annular chamber and first duct; - Said first end flange comprises a respective entrance opening for a refrigerating/cleaning liquid, said second end flange comprises a respective discharge opening of said refrigerating/cleaning liquid, and said first intermediate flange comprises a respective first connecting hole, in particular parallel to said axis; - Said drum comprises a first annular end gap, obtained at least partly in said first end flange and in communication with said entrance opening of said refrigerating/cleaning liquid; a second annular end gap obtained at least partly in the second end flange which is in communication with said discharge opening of refrigerating/cleaning liquid; said first connection hole being in communication with said first gap and with said second gap; - Said rotating joint comprises a low-pressure circuit (not-shown tank, 10i, 22i, 45, 47, 45, 21, 45, 47, 45, 22o, 10o, not-shown tank) allowing to channel said refrigerating/cleaning liquid from said entrance opening of said first end flange to said discharge opening of said second end flange through said first gap, said first connection hole and said second gap; and wherein - Said first annular chamber of said high-pressure circuit is interposed between said first gap and second gap along said longitudinal axis and is arranged more internally than connection hole with respect to said axis, so that said low-pressure circuit (not-shown tank, 10i, 22i, 45, 47, 45, 21, 45, 47, 45, 22o, 10o, not-shown tank) completely surrounds said annular chamber and can intercept possible undesired leakages of said first paint.