Partial sawtooth crashes in ohmic plasmas on TFTR are analysed using the high resolution electron cyclotron emission (ECE) image reconstruction technique. During the partial sawtooth crash, (m,n)=(2,2) or (3,3) modes are dominant. The (1,1) mode occurs after the partial crash. The partial sawtooth crash can be explained by the flattening of the (2,2) or (3,3) islands due to the localized reconnection