The main objective of the study was to know and understand the overall situation of the working children engaged in welding sector of city of Dhaka. The specific objectives of the study, therefore, are as follows: to know the nature of jobs perform by the worker; to explore the living and sleeping arrangement of the child labours; to understand their health status and health seeking behaviour (e.g schooling, food, leisure benefit); to explore kind of facilities get by the child worker. The population of the study consists all of the working children between the ages 5 to 18 living in the Dhaka city. Data were collected from Dholaikhal, Bijoy-Nagar Road and Tipu Sultan Road at Dhaka city. The study employed both qualitative and quantitative methods of data collection in order to get comprehensive picture and a thick description about the situation of the children who works in welding sector. The findings of the study revealed that many families rely on the income generated by their children for survival, so child labour is often highly valued. Additionally, employers often prefer to employ children because they are cheaper and considered to be more compliant and obedient than adults. When children are forced to work, they are often denied their rights to education, leisure and play. They are also exposed to situations that make them vulnerable to trafficking, abuse, violence and exploitation. Almost all child domestic workers work seven days a week and 90 percent sleep at their employer’s home, meaning that they are completely dependent on their employers and often have restrictions on their mobility and freedom. About 60 percent report some kind of abuse during their work, such as scolding or slapping. The findings of the study recommend that if Bangladesh wants to achieve millennium Development Goals. It is high time to take appropriate measure to eliminate child labour especially hazardous one.