This study investigated the changes in the types of social relationships before and after retirementwithin the secondary group, in which involved in the local society including their spouses andchildren. The study used the panel survey of a Korean longitudinal study of aging data from the 1st(2006) to the 3rd year (2010) to classify the types of relations for 378 retirees by latent class analysis.In terms of the latent class analysis, the types of social relationships before and after retirement weredivided into two heterogeneous groups. Before retirement, people belonged to 3 types of socialrelationships such as the children-oriented type, conjugal-and-secondary-relationship-oriented type,and distant-social-relationship type. After retirement, they were divided into 4 types of socialrelationships such as the children’s-financial-support-relationship, emotional-bondage-withchildren-relationship,conjugal-and-secondary-relationship-oriented type, and distant-social-relation type. Retirementrequires retirees to change their social network, which leads them to reinforcing the fellowshipwith their spouses and children and to reduce social relationships rather than expanding tosecondary groups of social relationships through changes of social networks while pursuing theemotional meaning of their post-retirement lives. This study is meaningful in that it showed thevarious adaptation types of retirees on the basis of their lives and empirical research on thechanges of their social relationships.