The relation between maternal alcohol consumption and infant attachment behavior at one year of age was investigated in this study. Alcohol consumption was estimated by self-report questionnaires filled out by mothers who were over 30 years of age. The questionnaire elicited information about the amount of alcohol mothers consumed prior to, during, and following pregnancy. Alcohol level was then computed using the Jessor, Graves, Hanson and Jessor AA score. The attachment behavior of 46 infants was observed at one year of age using the Ainsworth Strange-Situation Procedure. Infants were classified as: secure; insecure-avoidant; or insecure-ambivalent/resistent. Additionally, a new classification of insecure-disorganized/disoriented was used. This classification is thought to include infants who may have very serious attachment disturbances. Findings indicated that the majority of infants of mothers who consumed more alcohol prior to pregnancy and during pregnancy were insecure in comparison to a minority of insecure infants of mothers who were abstinent or light drinkers during those time periods. Other results indicated that the classification of infants as insecure-disorganized/disoriented helped to identify a large number of infants who were insecure in the group of heavy drinking mothers. A 34-item reference list is appended. (Author/RH)