In this study, a causal relationship between the performance variables of apartment sales marketing were analyzed. The results of empirical analysis are as follows. The number of effective DB prospects to increase the number of inbound calls and the number of inbound calls to be positive for the subscription rate and the initial sales rate. This study shows the number of inbound calls is important mediating performance variable of condominium sales marketing process. Next, the marginal effect of condominium sales marketing activities affecting the number of inbound calls was analyzed. To spend a certain amount of money per unit of analysis, the most effective ranking of condominium sales marketing were Cell phone text message>Newspaper Advertising>Publicity>sale flyer>Internet Advertising>TV Advertising in order.