[Objective] We researched the effects of inactivation of acetate synthetic pathway and expression of NADH oxidase on acetoin production in Corynebacterium glutamicum. [Methods] Heterologous expression of als SD operon in C. glutamicum CGF2 resulted in acetoin production strain CGT1, and disruption of acetate synthetic pathway gene cat and pqo was investigated. Subsequently, NADH oxidase from Lactobacillus brevis was developed for acetoin production under optimal oxygen condition. [Results] CGT1 accumulated ...