The objective of work was to determine the (S_BET) surface area and porosity of different origin starch using the ASAP 2000 apparatus, Micrometrics, by low temperature nitrogen absorption. Among raw starches the largest absolute surface had the oat starch (1.08 m²/g), and the smallest surface had the potato starch (0.24 m²/g). The largest volume of mesopores and their diameters were observed for oat starch.