The present study aimed at proposing criteria to develop the Performance evaluation of faculty members in private colleges in the Sultanate of Oman. Target participants were teaching staff working in private colleges in the Sultanate of Oman. The study was conducted based on five criteria including, a) quality of teaching, b) performing administrative and academic work, c) seriousness and perseverance at work, d) relationship with colleagues, and e) research and community services. Data were collected through a questionnaire filled out by 114 teaching staff in eight private colleges. To collect the data, a descriptive method was utilized, Findings of the study showed that participants were in high agreement with the statements regarding the items in the questionnaire about proposing criteria to develop the performance evaluation of faculty members in private colleges in the Sultanate of Oman. The questionnaire findings revealed no statically significant differences (p≤0.05) among the averages of the sample responses concerning the proposed criteria. The entire tool was attributed to gender, level of education, and years of experience. The most important recommendation of the study were unified central mechanisms at the level of private colleges in evaluating the performance of faculty members and relying on specific and unified objective criteria to ensure proper evaluation to be implemented at the departmental level annually.