The paper deals with thermodilatometry of green and fired ceramic samples. Problems connected with the measurements in dilatometric practice are described in detail, namely a) the influence of the pressing force of the push-rod, b) the effect of an improperly placed sample and improper measuring range, c) the influence of the volume of a sample, d) the influence of the heating rate, and e) the influence of the grounding and AD transducer on the results of the thermodilatometric analysis.