Abstract: The invention relates to a quick-action clamping holder for electronic or optoelectronic devices, particularly optoelectronic sensors, the housing of which has a external profile. The quick-action clamping holder has a body to be fitted at a holding location and at least one fixing arm, which can be pivoted from an open position into a closed position. In the closed position a device to be held is held with respect to the body by a back-gripping clamping engagement of the fixing arm with the external profile of the device. An actuating means is also provided for the manual actuation of the fixing arm. Furthermore, there is a spring means for pressing the fixing arm into the closed position or open position and that a locking means is provided for locking the fixing arm in the position where the latter is not forced or pressed by the spring means.