﻿AbstractRodents are well known as both seed predators and dispersers of various plant species in forest ecosystems, and they play an important role in the regeneration of vegetation. Thus, the research on seed selection and vegetation regeneration by sympatric rodents is an interesting topic. To understand the characteristics of preferences of rodents for different seeds, a semi-natural enclosure experiment was performed with four rodent species (Apodemuspeninsulae,Apodemusagrarius,Tscherskiatriton, andClethrionomysrufocanus) and the seeds of seven plant species (Pinuskoraiensis,Corylusmandshurica,Quercusmongolica,Juglansmandshurica,Armeniacasibirica,Prunussalicina, andCerasustomentosa) to investigate the differentiation in niches and patterns of resource utilization of sympatric rodents. The results showed that all the rodents had consumed many seeds ofPi.koraiensis,Co.mandshurica, andQ.mongolicabut differed significantly in how they selected the different seeds. The rate of utilization (Ri) ofPi.koraiensis,Co.mandshurica, andQ.mongolicaexhibited the highest values. TheEivalues indicated that the rodents tested exhibited differences in their priorities used to select the seeds from different plant species. All four species of rodents exhibited obvious preferences for certain seeds. Korean field mice preferentially consumed the seeds ofQ.mongolica,Co.mandshurica, andPi.koraiensis. Striped field mice favor the seeds ofCo.mandshurica,Q.mongolica,P.koraiensis, and Nanking cherry. Greater long-tailed hamsters prefer to consume the seeds ofPi.koraiensis,Co.mandshurica,Q.mongolica,Pr.salicina, andCe.tomentosa.Clethrionomysrufocanuslikes to eat the seeds ofPi.koraiensis,Q.mongolica,Co.mandshurica, andCe.tomentosa. The results supported our hypothesis that sympatric rodents overlap in food selection. However, each rodent species has a marked preference for food selection, and different rodent species differ in their food preferences. This reflects the role of distinct food niche differentiation in their coexistence.