The current study investigates the syntactic priming effects on sentence processing in Korean(L1) and English(L2) production through a measure of production time. The purpose of this study lies in investigating whether the priming condition facilitates the production process both in processors’ L1 and L2 production. Participants are 32 Korean native speaking (L1) university students who speak English as a second language(L2). The target structures were dative alternate structures: prepositional vs. double object dative structures in English and canonical(DAT-ACC) vs. scrambled(ACC-DAT) dative structures in Korean. The experimental paradigm involved the repetition of an auditory stimulus, followed by picture descriptions. The production time was measured by E-prime. As a result, while syntactic priming effects were observed both in L1 and L2 production, the syntactic primed condition did not reduce the production time in L1 utterances. However, the time was reduced in L2 utterances with failing in reaching to the statistically significant effects.