Abstract: The disclosure relates to a screw cap opener. The structure of the opener is mainly based on a firm cylindrical body (1) inside which there has been installed pressing parts (2) which functions as the gripping means of the screw cap. The device functions so that when it is pressed against the top of the screw cap to be opened the pressing parts start to close strongly squeezing the screw cap from its sides. When the device is twisted, the cap either opens or closes. Structurally the functioning of the device is based on pressing parts which have been installed against the inside surface of the body with an axle so that they can turn vertically at an angle of approx. 25.degree. in a downwardly slanting position close to a horizontal plane.