PURPOSE: The purpose of this study was to develope a evaluation tool of the quality of nursing care for aneurysmal subarachnoid hemorrhage patients at Hunt & Hess Grade I~III. METHOD: The data was gathered from April 15, 2002 to June 14, 2002. The tool proceeded in six steps according to Bloch's framework. RESULT: The results of this study are as follows: 1) The quality evaluation tool for neurosurgery ICU consisted of 25 standards and 138 criteria. The quality evaluation tool for ward consisted of 27 standards and 144 criteria.; 2) The content validities of the tools for neurosurgery ICU and ward were 0.96 and 0.98, respectively.; 3) The Pearson coefficients for evaluating the interrated reliability of the tools for neurosurgery ICU and ward were r=0.9106 (p<0.1) and r=0.8807 (p<0.1), respectively.; 4) The ranges of corrected item-total correlations for evaluating the construct validity of the tools for neurosurgery ICU and ward were 0.0279~0.9354 and 0.0174~0.9682, respectively.; And 5) The ranges of Cronbach's alpha reliabilities for evaluating the internal consistency reliability of the tools for neurosurgery ICU and ward were 0.6040~0.8554 and 0.6212~0.9584, respectively. CONCLUSION: The tools developed in this study seem useful in evaluating the quality of nursing care for aneurismal subarachnoid hemorrhage patients at Hunt & Hess Grade I-III.