Chromosomes from seven species of Tupaiidae, including Tupaia glis, T. chinensis, T. longipes, T. montana, T. minor, T. palawanensis and Urogale everetti, were analyzed. The diploid number varied from 68 for T. montana to 44 for U. everetti. T. glis and longipes had identical karyotypes and diploid numbers (2n = 60). T. minor had a diploid number of 66, and palaivanensis had one of 52. The number of biarmed chromosomes per cell varied considerably among the species studied.