Abstract. Aflatoxin B1 (AFB1) contaminantions are a major concern in poultry industry because result significant economic losses and public health burden. The objective of this study was to asses the effect of curcumin supplementation in AFB1-contaminated diet on the performance and external egg quality of laying duck. Fourty eight seven-months female Alabio ducks (Anas platyrinchos Borneo) were randomly allocated into 3 groups with 4 replicates of 4 ducks per pen: (1) Control (commercial feed); (2) AFB1 100 ppb diet (Control + AFB1- contaminated diet} and (3) CUR diet (AFB1 100 ppb diet + 0.05% Curcumin). Experimental diet was conducted for 42 days. Ducks were weighed on day 21 and 42 to calculate the body weights change. The percentage of egg production was calculated since 21st day. Egg weight, egg shell thickness and yolk weight percentage were determined in eggs collected on the last three days of the experiment. Data were subjected to analysis of variance (IBM SPSS 21). Result showed live weight and weight gain were signifcantly lower in AFB1 diet (P < 0.05), and curcumin inclusion could diminish this toxic effect of AFB1. However, treatments had no significant effects (P > 0.05) on egg production and egg external qualities. It was concluded that curcumin supplementation has positive effects on the laying duck performance which exposed by AFB1 through contaminated diet ingestion.