[en] To increase the device reliability and structural material economy the working section of the sample charging device for in-pile testing is produced in the form of a holder with a sloping sided cap fixed on it. A sample is placed to the cap. Under the chamber charging during the inpile irradiation testing the sample is placed to the cap and then supplied to the chamber through the charging well using a special rod. By means of rod rotation the cap with sample is placed between the punches and fixed. The charging device is fully with drawn from the unit and the charging well is sealed. The cap wall icline is chosen with regard to the sample non-overturning condition, therefore the sample always occupies the vertical position in the cap