The purpose of this research is to analyze the factors affecting labour migration from the Northeast of Thailand to Bangkok; to describe the characteristics of migrant labour, and to study the demand of labour on social welfare. The random sampling of populations included the two provinces in the upper Northeast, which are Roi et and Khon Kaen province, and the other two provinces from the lower Northeast, which are Buri Ram and Srisaket province. Data was collected from 682 migrated labourers, and data analysis applied the logistic regression analysis method. The results indicated that in the past several years, Bangkok has attracted an increasing numbers of migrant workers, especially from the Northeast. Factors affecting labour migration from the Northeastern of Thailand to Bangkok are the age of labour, the unemployment occurrence before migration, the difficulty of looking for jobs in local areas before migration, and the distance between the original province and the destination province.