This study examines (a) the rural household participation in the Vietnamese rural credit market, (b) the behavior of a formal lender in response to the credit needs of households, and (c) the impact of credit. The rural credit market in Vietnam is quite segmented. The formal sector specializes in lending for production purposes whereas the informal sector's lending is quite diverse. We show that rural households are rational in deciding which sources to ask for a particular kind of loan. Reputation, the dependency ratio of households, and the amount of credit applied for by the household are identified as the determinants of credit rationing by the bank. Credit is shown to have a significant impact on household production.