Background & Purpose: This study aims to consolidate expert views and validated 371 items for developing spiritual intelligence instrument for Muslim nurses guided by the Spiritual Intelligence Model for Human Excellence (SIMHE). Methods: A Fuzzy Delphi Method (FDM) was used to validate these items and analyzed with Triangular Fuzzy Numbers and Defuzzification process. Views from 20 experts from three different backgrounds, namely, theology/Sufism, psychology and Islamic counseling, and evaluation and measurement, were also included in the validation process. Results: All items fulfilled the prerequisite of a threshold level of (d) ≤ 0.2, which obtained more than 75% of expert consensus and α-cut value ≥ of 0.5. Conclusion: The FDM analysis results indicated that all items could further validate the instrument using Rasch measurement analysis.