Abstract: The present invention relates to a hanging clamp for different size rods, which comprises a L-shaped base having a body, a rotatory piece capable of rotating at a predetermined angle, as well as a clamping member also capable of rotating at a predetermined angle; wherein a retaining portion projects out of one end of body, the rotatory piece is pivoted at a proper position of body by means of a first pivotal axis, while the clamping member is pivoted at one end of rotatory piece by using a second pivotal axis; furthermore, the clamping member in response to the retaining portion is provided with an arc-shaped clamping surface having a concentric circle, whereby enabling the rotatory piece pivotally rotate the clamping member to clamp different size rods, by using the changeable distance between the clamping surface and the retaining portion; prefectably, the clamping member can also pivotally rotate to increase or decrease said changeable distance between the clamping surface and the retaining portion, so as