The Gye Associations that existed during the Joseon dynasty period are important in studying the nature of the Joseon society. Although many aspects of the Gye have already been revealed, there are things that are yet to be explored. Examined in this article is the financial management of Jog’gye, which was a fund association of the Yangban clans, in the latter half period of Joseon, through an account book of the Nampyeong Mun house of the Yeong’am-gun area of the Jeolla-do province. The book contains detailed record of the clan"s revenue and expenditure from about two hundred years ago. Jog’gye hardened the clan"s solidarity, and the clan members managed their finance to stabilize the Jog’gye. Characteristics of the Nampyeong Mun house Jog’gye, in terms of revenue and expenditure, show that various expenses were made in management of farmlands, ancestral rituals, meetings, condolence money, guest relations, and loans. The clan also regularly spent a certain amount of money on memorial services to strengthen their inner unity, and over 40% of the whole budget was invested in stabilizing Jog’gye. Investment was not made solely to create profits, but also for the concern of the members of Jog’gye. However, the management of Jog’gye gradually reduced and disappeared after 1927. Case study of a single local clan account book would be insufficient to explain the general characteristics of financial managements of the Gye units, but from it we can survey a specific clan"s financial management.