This study is the effect analysis of rent and security deposit, resident's attributes on rent arrears of private rental housing in Japan. This study aims to provide analysis result such as impact of rent arrears for housing stability, effects of income, rent, occupation etc. on rent arrears required for the discussion of housing safety net. The main findings are as follows. 1) 3 months in rent arrears inhibit the housing stability. Because 61.2% of residents who were 3 months delinquent rent are not continuing the residence 1 year later (table 2). 2) Results of logistic regression analysis show the following. Rent arrears probability in case of no security deposit, male, income (¥2,000,000-¥4,000,000) is hight. In the case of a company employee, government worker, 60 years of age or older is low. Rent arrears probability of welfare recipients is particularly high (Odds ratio:3.84-17.96,1% significance level, all case). Rent arrears probability of the high rent properties (¥120,000 or more) is particularly hight in tokyo (Odds ratio:2.64-5.58,1-10% significance level). These results suggest implications as follows. Probably monetary benefits does not solve the housing loss problem. Because factor of rent arrears is not the only income. Moral hazard has occurred on high rent properties in Tokyo. And it is a problem that must be solved.