Dusty knots are known to exist within supernova remnants (SNRs). the dust in these knots could be sufficiently heated by the X-ray emitting plasma to radiate in the far-infrared (FIR) wavelengths. We have searched the IRAS Point Source Catalogue for FIR sources associated with 117 SNRs from the catalogue of van den Bergh. We selected IRAS sources with definite flux densities at 60 μm or 100 μm and the flux density increasing with wavelength beyond 25 μm. For each SNR, background source density was determined in an area surrounding the SNR and the number of excess sources within the SNR area (with 10% radial extension) was determined.