Using stakeholder theory as the basis and organizational identity as the core concept, this research probed into the content dimensions of the stakeholders' organizational identity connotation in the nonprofit organization. 15 semi-structural interviews of 7 NPOs were collected. The respondents ranged from top management (CEO, vice-CEO), middle managers (ex. directors of social workers), administrative staff, to volunteers. After grounded theory analysis, two main approaches (inside vs. outside; static vs. dynamic) and five dimensions, ten categories were inducted from qualitative data.