- This study evaluated the reliability and validity of the Hebrew version of the Late-Life Function and Disability Instru- ment (LLFDI). Fifty-five older adults (mean age 79.7 +/- 5.2) participated. We calculated test-retest reliability with intraclass correlation coefficients (ICCs). Partial correlations determined the construct validity with a balance measure (Berg Balance Scale (BBS)) and a mobility measure (Timed Up and Go (TUG) test). We examined known-groups validity by comparing the scores of cane and noncane users. Test-retest ICCs ranged from good to excellent (0.77-0.90) for the functional component and fair to good for the disability component (0.63-0.83), except for the disability management role subscale (0.46). BBS and TUG were associated with LLFDI overall function (r = 0.48, p < 0.001 and r = -0.52, p < 0.001, respectively). TUG and BBS were weakly associated with disability limitations (r = -0.26 and 0.32, respectively) and disability frequency (r = -0.16 and 0.24, respectively). Cane users showed significantly lower function scores than noncane users. We demonstrated that the Hebrew ver- sion of the LLFDI reliably and validly assesses older adults' function and disability. The LLFDI is recommended as an out- come instrument in studies in which older adults' function and disability are outcomes of interest.