In this study, we analyzed apoptotic cell death and morphological alterations in red blood cells induced after UVA exposure and the p53 dependency to these phenomena. As well as apoptosis, the categories and number of the morphological abnormalities in red blood cells increased 24 h after the UVA exposure depending on exposed UVA doses both in WT and the p53 deficient. On the other hand, the apoptosis and alterations in the UVA exposed red blood cells decreased to the non-exposed control level 14 days after the exposure both in WT and the p53 mutant, clearly indicating that the effects of UVA exposure can be restored. Furthermore, the present study presents the evidences that numbers of apoptotic and morphologically altered red blood cells were significantly less in the p53 mutant than in WT.