Absorbable suture material has several theoretical advantages in operations for congenital heart defects performed in infancy. This study compares handling characteristics of absorbable polyglyconate (Maxon) and non-absorbable polypropylene used in a variety of operations for congenital heart defects. There was no difference in mortality and morbidity between the two groups (50 patients each). Satisfactory tensile strength was noted in both groups. Maxon had more suppleness and first throw holding but more tissue drag when compared with polypropylene. Maxon was considered to be a suitable suture material in operations for congenital heart defects when the use of absorbable material is indicated.