This invention relates to a safety locking means, particularly Multi functions Safety Lock means for a pressure cooker acting as a pressure indicator cam locking means comprising of a rod (1) as visual pressure indicator and a washer (4) suitably and removably fixed to avoid erroneous opening and closing of the pressure cooker thereby ensuring safe operation by the rod positioning above the lock cover (3) under pressure where restricts opening of the pressure cooker otherwise enables the pressure cooker to be opened when not in pressure. This locking means can be used on any type of pressure cooker including microwave pressure cooker.