Objectives ： To find a possible association between childhood Attention Deficit Hyperactivity Disorder (ADHD) features and adulthood alcohol use disorder, we investigated the scores of the Wender-Utah Rating Scale (WURS) in Korean male patients with alcohol use disorder. Methods ： Seventy-one adult male patients with alcohol use disorder and 71 normal adult male controls were included in the study. The ADHD features of childhood were determined using the WURS. The total score and three Factor Sum Scores (Impulsivity score, Inattention score, Mood instability score) were analyzed. In addition, we investigated the scores of the Adult ADHD Self-Report Scale- V1.1 (ASRS) and clinical characteristics in association with childhood ADHD features. Results ： Childhood ADHD and adulthood ADHD features were found 28.2% and 14.1% in the patient group, respectively. The WURS scores were significantly higher in the patient group, as compared to the control group. Familial loading of alcohol use disorder and depression, ASRS, education, occupational status, and previous suicidal attempts were associated with one or more Factor Sum Scores. Higher inattention score was associated with previous suicidal attempts in the patients group (p=0.038, OR=1.16). Conclusion : The study results indicated that childhood ADHD features are the risk factors of adulthood alcohol use disorder in the Korean male population. Especially, childhood inattention could be a significant risk factor for suicidal behavior in patients with alcohol use disorder.