Background and Purpose: Individuals with amyotrophic lateral sclerosis (ALS) develop balance problems. This study was conducted to determine the reliability of the Tinetti Balance Test for individuals with ALS. Subjects and Methods: Subjects in Stages I -III volunteered for Parts 1 (n=21) and 2 (n=11). One physical therapist and 2 physical therapy students (Part 1) rated subjects' live performances of the Tinetti Balance Test. Two physical therapists and 4 physical therapy students (Part 2) rated videotaped performances twice. Results: Excellent ICC values (> 0.90) were found for the total Tinetti Balance Test scores in Parts 1 and 2. In Part 1, substantial to almost perfect agreement among all 3 raters (kappa range 0.62 -0.84) was found for 88% of individual maneuvers. In Part 2, fair to perfect agreement (kappa range 0.40 -1.00) was found on 93% of maneuver scores recorded 1 week apart for the 6 raters. Conclusion:The results suggest that the Tinetti Balance Test is reliable for examination of individuals with ALS in Stages I-III by physical therapists and physical therapy students.Post-Doctoral Fellow and Lecturer,