This study investigates how organizational culture (OC) influences the adoption of mobile IT in organizations. So far, research has only considered control or flexibility-oriented OC as an influencing factor in mobile IT adoption. We use the competing values model of Denison and Spreitzer to extend the existing theory and assess whether an external or internally-orientated OC influences mobile IT adoption in organizations. Based on a quantitative questionnaire, we collected data from CEOs, CIOs, and managers from 101 organizations. Employing PLS, the relationships of two culture types - group culture (GC) and developmental culture (DC) - and their influence on mobile IT adoption in customer relations, supplier relations, and production and operations is tested. The results show that GC and DC influences mobile IT adoption differently. GC has a positive influence on mobile IT adoption in production and operations and DC on mobile IT adoption in customer relations. Hence, the study indicates that mobile IT adoption is subject to cultural bias. The findings can support executives by creating an awareness of culturally-biased adoption. We contribute new insights into the understanding of mobile IT adoption and extend the existing theory concerning the influence of OC on organizational mobile IT adoption.