In this study, the main subject is to contribute to the businesses as well as academic researchers about the effect of organizational culture in reaching the organizational effectiveness. Sustaining the organizational effectiveness is an important factor for organizational development and, the managerial level employees may utilize from the results of this study when constructing their strategy maps. To perform the study, we made a research analysis and applied a survey instrument on a number of 578 employees in metalworking industry. We constructed an original model to fulfill the gap between the organizational culture and organizational effectiveness. We measured the organizational culture in dimensions of 'involvement', 'collaboration', 'transmission of information, 'learning', 'care about clients', 'strategic direction', 'reward and incentive system', 'system of control', 'communication' and 'coordination and integration'. Additionally, we measured the organizational effectiveness in terms of 'customer orientation', 'employee satisfaction', 'organizational commitment' and 'financial & growth performance'. The methodology was carried out as researching for the survey questions on the literature, constructing the best fitting survey from the alternatives, reaching the participants and informing them for the survey, gathering the data, and measuring & analyzing these data. The gathered data were entered in SPSS (Statistical Package for the Social Sciences) version 11.5. By the results of the SPSS analyses, we determined that the constructed model is significant (at the 0.000 level) and all organizational culture dimensions have significant correlations with organizational effectiveness (at the 0.000 level). Furthermore, the total explained variance of organizational effectiveness depending on -organizational culture dimensions- has come out as the value of 0.60. Therefore, we may conclude that; the academic researchers as well as managerial level employees should investigate other factors to reach a high level of effectiveness.