This study, in which staff nurses in Taiwan participated, was aimed to construct a model for relationships among trustworthiness, trust behavior and organizational identification. One hundred and ninety five anonymously completed questionnaires were collected. Superiors' trustworthiness, staff nurses' trust behavior, and organizational identification were identified as latent variables to which the following indicators were to be applied: integrity, benevolence, ability, communication, consistency, compliance, sharing, teamwork, subordination, membership, loyalty and similarity. A logical trust and organizational identification model was constructed and tested with LISREL (Linear Structural Relations) analysis. Benevolence was eliminated due to excessive residual value. The adjusted model passed pertinent tests. It was also revealed that trust behavior acts as a mediator between trustworthiness and organizational identification. The results of this study may be taken as a reference for the training of supervisory level personnel, as well as for strengthening the organizational identification of staff nurses, and as a beginning phase in the construction and testing of a relationship model for the relationship between trust and organizational identification.