This study examines the attitudes of a group of parents of nonhandicapped children toward preschool mainstreaming, focusing on individual and demographic correlates of parent attitudes. Attitudes held by mothers and fathers were examined separately. Maternal attitudes were related to the positiveness (but not the overall amount) of their experiences with handicapped individuals, famiy income, education, age, and age of the nonhandicapped child. Only one significant correlation was found for fathers. Attitudes held by mothers and fathers were positively correlated. Preschoolers with severe mental retardation, emotional disturbance, or behavior problems elicited the most concern from parents relating to mainstreaming. Perceived benefits and drawbacks to mainstreaming are presented.Although preschool mainstreaming has received much attention in the literature, one relatively neglected area of research concerns the attitudes of parents of nonhandicapped young children toward mainstreaming. This was noted by Blacher and Turnbull in 1983 and still remains true. Understanding the attitudes and concerns of these parents is important as efforts are made to expand mainstreaming into a greater variety of community settings.Research focusing on parents of handicapped preschool children (Blacher & Turnbull, 1982; suggests that these parents generally hold positive attitudes toward mainstreaming. A study by Turnbull, Winton, Blacher, and Salkind (1983) examined the attitudes of parents of handicapped and nonhandicapped children involved in a mainstreamed public school kindergarten and found many similarities in the views of the two groups of families toward the benefits and drawbacks of mainstreaming. This study, however, did not include parents of nonhandicapped children not attending mainstreamed classes. This latter group is especially important to an understanding of the attitudes and concerns of preschool and day care parents that may facilitate or impede attempts to integrate these programs.