The thermal expa11sion of fullerite C 60 has been measured in the temperature range 2-9 K. A compac.t~d fullcrite sample with a diameter of about 6 mm and height of 2.4 mm was used. It was found that at temperatures below-3.4 K the linear thermal expansion coefficient becomes negative. At temperatures above S K our results are in good agreement with the available literature data. A qualitative cxplaPation of the results is proposed.