The purposes of this research were to assess the combined phytotoxicity of glyphosate and carbendazim which were normally used as herbicide and fungicide contaminated in soil as 100 – 1000 mg/kg on seedling growth of ridge gourd. Both of glyphosate and carbendazim were toxic to shoot and root growth of ridge gourd seedlings. The 50% effective concentration (EC50) on shoot length root length root fresh weight and shoot dried weight of ridge gourd seedlings for glyphosate were 669.4 413.0 574.5 and 241.4 mg/kg respectively whereas for carbendazim were >1000 357.8 >1000 and 71.4 mg/kg respectively. Co-contamination between glyphosate and carbendazim seemed to be antagonistic effect. Both of glyphosate and carbendazim at all concentration were not toxic to chlorophyll content in cotyledon of ridge gourd seedlings.