The conventional karyotypes on 160 plants of Allium monanthum collected from five random localities in Kyungpook province were investigated. Ploid composition of this species were diplaid, triploid and tetraploid. Basic chromosome composition consited of a pair of acrocentric with a small satellite, and the rest metacentrics or submetacentrics. Diploid plants were distributed in Daeduk Mt, Naeyeon Mt., triploid in Kumo Mt., Naeyeon Mt, and Bissul Mt., and tetraploid in Hwanghak Mt. and Bissul Mt.