This study was carried out to improve the ability of embryo formation and the efficiency of plant regeneration from suspension cultured cells of seed derived calli of orchardgrass (Dactylis glomerata L.). The frequency of formation of round cell and cell colonies was highest at 50 days after suspension culture in $N_6$ medium supplemented with $4;g/{ell}$ casein hydrolysate (CH), $20;g/{ell}$ sucrose and $30;g/{ell}$ sorbitol. The highest frequency of plant regeneration and somatic embryo formation was obtained from suspension cultured cells of 60 days. Addition of CH ($4;g/{ell}$) in suspension culture medium gave the highest frequency of embryo formation (39.6%) and plant regeneration (73.0%).