By using an X-ray diffraction technique the compression of stishovite under pressure was studied to 10 GPA (100 kbar). The linear fits for the cell edge and volume compressions are as follows: (1-a/a0)/P (1.31¿0.11) ¿10-3 GPa-1; (1-c/c0)/P= (0.57¿0.22) ¿10-3 GPa-1; (1-V/V0)/P= (3.17¿0.17) ¿10-3 GPa-1; and (Δc/c0)/(Δa/a0) =0.44¿0.17. The zero-pressure bulk modulus of stishovite is 288¿13 GPa based on a pressure derivative of the modulus of 6¿1. This is in agreement with Bassett and Barnett (1970) and Chung (1974).