A detachable handle detachably installable at a cooking vessel while holding or releasing a rim of the cooking vessel, the handle comprising: a body having a fixing holding element extended by a predetermined length in a shape appropriate to be held, including a receiving chamber provided therein, and contacting an outer wall of the rim of the cooking vessel; an actuation holding member having an actuation holding element provided at one end thereof so as to contact an inner wall of the rim of the cooking vessel and installed to be horizontally moveable in the receiving chamber to move forward or rearward with respect to the fixing holding element and be restored to the releasing state using a restoring element provided at the other end thereof, in order to hold the cooking vessel in a relationship with the fixing holding element; a rotary knob installed on the body so as to be rotatable using a support shaft in a vertical direction intersecting with a direction in which the actuation holding member moves forward or rearward; a power transmitting structure provided between the actuation holding member and the rotary knob to convert rotational force of the rotary knob into linear movement and generate forward or rearward movement of the actuation holding member associated with the fixing holding member, thereby accomplishing the hold or the release; and characterized by further comprising a control means including teeth rows provided at both sides of an actuation hole formed in the actuation holding member in a forward or rearward movement direction of the actuation holding member and a control button having a spline axis installed in the body to appear or disappear in a vertical direction intersecting with the forward or rearward movement direction of the actuation holding member to brake or release the actuation holding member while being engaged with or separated from the teeth rows, thereby allowing the holding state of the actuation holding member to be maintained or released, wherein the rotary knob is rotated in a forward direction or a reverse direction, such that the actuation holding member associated with the fixing holding member of the body is engaged with the rims according to different cooking vessels having different thicknesses to hold or release the rims, while moving forward or rearward. a body having a fixing holding element extended by a predetermined length in a shape appropriate to be held, including a receiving chamber provided therein, and contacting an outer wall of the rim of the cooking vessel; an actuation holding member having an actuation holding element provided at one end thereof so as to contact an inner wall of the rim of the cooking vessel and installed to be horizontally moveable in the receiving chamber to move forward or rearward with respect to the fixing holding element and be restored to the releasing state using a restoring element provided at the other end thereof, in order to hold the cooking vessel in a relationship with the fixing holding element; a rotary knob installed on the body so as to be rotatable using a support shaft in a vertical direction intersecting with a direction in which the actuation holding member moves forward or rearward; a power transmitting structure provided between the actuation holding member and the rotary knob to convert rotational force of the rotary knob into linear movement and generate forward or rearward movement of the actuation holding member associated with the fixing holding member, thereby accomplishing the hold or the release; and characterized by further comprising a control means including teeth rows provided at both sides of an actuation hole formed in the actuation holding member in a forward or rearward movement direction of the actuation holding member and a control button having a spline axis installed in the body to appear or disappear in a vertical direction intersecting with the forward or rearward movement direction of the actuation holding member to brake or release the actuation holding member while being engaged with or separated from the teeth rows, thereby allowing the holding state of the actuation holding member to be maintained or released, wherein the rotary knob is rotated in a forward direction or a reverse direction, such that the actuation holding member associated with the fixing holding member of the body is engaged with the rims according to different cooking vessels having different thicknesses to hold or release the rims, while moving forward or rearward.