Attention-deficit/hyperactivity disorder (ADHD) rates have increased in recent years, resulting in the need for more classroom support. In Wales, support for many pupils with ADHD is provided by the 16,157 teaching assistants (TAs) employed by local authorities. This qualitative study interviewed 15 primary school TAs to answer three questions concerning their feelings about their job, and the facilitators and barriers to their work with children with ADHD. Using thematic analysis, the researchers identified 10 themes: positive feelings, negative effects, a need for change, support, improvement over time, one-to-one relationship, lack of support, negativity towards ADHD, classroom environment, and poor knowledge and experience with ADHD. This study illustrates the TAs' love for their job and the importance of positive relationships. It also highlights a lack of support for TAs and negativity towards ADHD. Implications of the study and recommendations for the future are discussed.