The silkworm growth and cocoon yield as influenced by legume intercrops at 60 days after planting (DAP) was studied in rainy season 2001. Performance of silkworms (NB4 D2) on S 41 mulberry with legume intercropping system showed non-significant difference with respect to larval characters. Silk productivity (4.81) and silk gland weight (1.57 g) were significantly higher in mulberry + soybean (3 rows). ERR of 85.66 percent was recorded in mulberry + soybean (2 rows). Cocoon yield and grainage parameters (except fecundity) were non significant. Whereas, cocoon characters differed significantly. However, higher shell per centage (18.94) in mulberry + soybean (2 rows), least denier (2.16) in mulberry + greengram/ blackgram (2 rows) and lower renditta (7.93 and 7.99) in mulberry + soybean (2 rows) and mulberry + blackgram (3 rows) was recorded.