Behavioral problems among the toddlers are common and result from the child's need for autonomy and exploration. Toddler might like to continue to excrete whenever tension in the bowel or bladder occurs. An important part of dealing with the issue of toilet training is to educate parents about the signs of readiness for their child to begin. A pre experimental research approach and one group pre test post test design was adopted to find out the effectiveness of structured teaching programme on behavioral problems and toilet training. This study was conducted on mothers of toddlers admitted in pediatric wards at RMMCH, Chidambaram. Data were collected through structured questionnaire. The total sample comprises of 50 mothers of toddlers who full fill the inclusion criteria. This study assessed the knowledge and attitude among mothers of toddlers regarding behavioral problems and toilet training, and found that the mothers had inadequate knowledge related to behavioral problems and toilet training. The study concluded that the structured teaching programme was effective in improving knowledge and attitude of mothers regarding behavioral problems and toilet training.