Objectives: The purpose of this study is to identify longitudinal changes in poverty and depression by elderly household type, and to investigate the relationship between two trajectories over time. Methods: For analysis, data from the Korean Welfare Panel (1st to 10th waves) were used and analyzed 1,988 young-old with semi-parametric group-based model and dual trajectory model. Results: In the results, the depression trajectory was divided into 3 types for the persistent alone group and 6 types for the persistent non-alone group, and the poverty trajectory showed 3 types for persistently alone elderly group and 5 types for persistently non-alone elderly group. As a result of examining the long-term changes in both trajectories at the same time, the group of elderly living alone was more vulnerable to the chronic situation of poverty and depression than the group of elderly living alone non-permanently. Conclusion: Based on the results of the study, it was suggested the implications of poverty and depression intervention according to household types as well as longitudinal understanding of poverty and depression among the elderly