A reproducible system for gene transfer in lentil through particle bombardment is presented. Lentil cotyledonary nodes excised from germinated seedlings were bombarded with a plasmid containing a mutant acetolactate synthase gene (ALS) from tobacco conferring resistance to sulfonylurea herbicides. Putative transgenic shoots regenerated on Murashige and Skoog medium supplemented with 6-benzylaminopurine (BA) and chlorsulfuron (5 nM for first 4 wk followed by 2.5 nM for the remainder of the culture period) were micrografted and successfully transferred to soil. T0 and selfed progeny plants were screened using metsulfuron herbicide leaflet painting. The non-transformed escapes died and transformed plants survived the test. The surviving plants were phenotypically normal and produced viable seeds. The presence and stable transmission of the transgene into genomic DNA of screened T1 transformants was confirmed by PCR and Southern hybridization. This method for producing transformed plants will allow new opportunities for lentil breeding to produce improved cultivars.