A cooking device comprising a body, a control panel provided on the body, a control element for adjusting a power level of a heat source, the control element comprising a shaft extending through the control panel and a control knob provided on the control panel and connected to the shaft for rotating the shaft, wherein the control knob comprises at least one outer body movable relative to the shaft in an axial direction of the shaft, at least one inner body connected to the shaft in a manner not movable relative to the shaft wherein the inner body is located at least partly in an opening of the outer body and the inner body is exposed to be gripped by a user when the outer body is moved in a direction towards the control panel, wherein the control knob comprises at least one spring element provided inside the control knob, for pushing the outer body in a direction away from the control panel, a ring body positioned on the control panel in a manner not movable relative to the control panel for guiding a movement of the outer body and wherein the inner body comprises at least one grabbing wall, characterized in that - at least one tooth part is provided inside the ring body and a blocking part is provided on the outer body in a manner engaging to the tooth part for blocking a rotational movement of the outer body, when the outer body is pushed by the spring element to an end position in the direction away from the control panel and - the control knob is designed such, that -- during the usage of the control knob, first of all, the user pushes the outer body towards the control panel in the axis of the shaft by a force, wherein the inner body partially passes through the opening, and the grabbing walls protrudes from the outer body in such way that the inner body is exposed to be gripped by the user, -- during pushing of the outer body by the user, the spring force is overcome, and the blocking part is removed from the tooth part in such way, that the outer body has rotation freedom together with the inner body, and -- when the user removes the pushing force exerted to the outer body, the outer body is pushed outwardly as a result of the effect of the spring force, and the inner body is hidden inside the outer body, wherein meanwhile, the blocking part is fixed to the tooth part. - at least one tooth part is provided inside the ring body and a blocking part is provided on the outer body in a manner engaging to the tooth part for blocking a rotational movement of the outer body, when the outer body is pushed by the spring element to an end position in the direction away from the control panel and - the control knob is designed such, that -- during the usage of the control knob, first of all, the user pushes the outer body towards the control panel in the axis of the shaft by a force, wherein the inner body partially passes through the opening, and the grabbing walls protrudes from the outer body in such way that the inner body is exposed to be gripped by the user, -- during pushing of the outer body by the user, the spring force is overcome, and the blocking part is removed from the tooth part in such way, that the outer body has rotation freedom together with the inner body, and -- when the user removes the pushing force exerted to the outer body, the outer body is pushed outwardly as a result of the effect of the spring force, and the inner body is hidden inside the outer body, wherein meanwhile, the blocking part is fixed to the tooth part. -- during the usage of the control knob, first of all, the user pushes the outer body towards the control panel in the axis of the shaft by a force, wherein the inner body partially passes through the opening, and the grabbing walls protrudes from the outer body in such way that the inner body is exposed to be gripped by the user, -- during pushing of the outer body by the user, the spring force is overcome, and the blocking part is removed from the tooth part in such way, that the outer body has rotation freedom together with the inner body, and -- when the user removes the pushing force exerted to the outer body, the outer body is pushed outwardly as a result of the effect of the spring force, and the inner body is hidden inside the outer body, wherein meanwhile, the blocking part is fixed to the tooth part.