Research on underlying behavior of both current and prospective consumer within banking industry is an important issue. The choice of consumer in selecting banking institution not only determined by economical factors but also may influence noneconomic factors, such as their attitude and beliefs. This article was based on the research conducted to identify factors that could differentiate consumers’ choice on selecting banking services; between conventional and syaria banks. The sample of this study was divided into four groups; syaria customer, conventional bank’s customer, customer of both syaria and conventional banks, and non-consumer neither syaria nor conventional banks. The sample was selected by using convenience sampling technique located in municipalities and regencies where there exist both syaria and conventional banks offices. The respondent of the study varies based on their demography characteristics which consist of 310 repondents. The data was analysed by utilizing descriptive approach and crosstab analysis.
Further, in order to determine the dimension of factors underlying the buying decision of customer in selecting the banks, this study employs factor analysis. The result of factor anlysis indicates that there exist differences in the dimension underlying their decision in selecting banks. In case of syaria bank, there are several dimensions, namely; perception, personnal selling, family, cost and benefit, religion and beliefs. Meanwhile for conventional bank such underlying dimension influenced by; rational motivation, cost and benefit, family, promotional activities, and life style. Further analysis through crosstab analysis, there exist several relationships between several dimensions utilized in the study. Such relationship has been found between the age, income, educational level, occupation and the banking type that the respondent selects. The research also found that there is no relationship between repondent’s perception on interest and the type of bank that they choose. In other word, the majority of respondent of this study did not agree with the interest principle but they still choose to deal with banking institution based on their economic rationale.