Recently, problems in adults with attention-deficit/hyperactivity disorder (ADHD) has been an attention-getting topic in campus mental health. ADHD is characterized by inattention and/or hyperactivity-impulsivity symptoms. Adult ADHD is especially characterized by inattention. Poor academic performance is significant in university students with ADHD. Comorbidities with other psychiatric disorders are common and can lead to further impairments. Social recognition about ADHD is increasing little by little, but there is little consultation from students who are troubled with inattention. In this study, a questionnaire about ADHD was conducted to university students. Many students were troubled by inattention and/or hyperactivity-impulsivity which made their lives difficult. On campus, it would be important to provide the students with appropriate information about ADHD, and to offer them with early support.