engaging projection 5 is provided on the upper part of the inner surface of each vertical wall 4 in such a way that the engaging projections on the vertical walls extend towards each other a flexible supporting portion 6 extends from the outer surface of each vertical wall 4 and the opposite flexible supporting portions 6 support a v shaped fitting portion 8 above the housing portion 3 an engaging panel 9 is formed on the outer surface of each end of the fitting portion 8 thus when a pipe rod or other object to be fixed 7 is put in the fitting portion 8 and when the fitting portion is folded and pushed in the housing portion 3 the engaging pawls 9 will be brought into engagement with the engaging projections 5 thereby fixing the object to a panel etc to which the fixing device is anchored in fixing an object 7 to a panel etc with the conventional clamping device first the device is fixed to the panel etc by the anchor 2 of the device and then the object 7 is laid above the fitting portion 8 of the device and is put in the fitting portion 8 the fitting portion 8 is folded and pushed in the housing portion 3 and then the engaging pawls 9 are caught by the engaging projections 5 thereby positively holding the object thus the object can be easily fixed without any fear of marring the object also the object holding force.