This main objective of this survey research was to study the quality of life of the preschool children whom their parents were migrant labour in Leam Chabang Municipal area. The relationship among variables and the interrelationship between selected predictors and the childs quality of life were also examined. Data were collected during December 1993 to January 1994 from 255 sample children through physical examination and child development test. Structured interview questionnaire developed by researcher (which comprised of 2 parts of questions:- the demographic data and other studied variables, and questions about childs quality of life focusing on 3 aspects- nutrition and health

intellectual, mental, emotion and social development

and fundamental of child right) was used to collect data from mothers of the sample. Chi-square test, Peasons Product Moment correlation, and Multiple Classification Analysis (MCA) were employed to analysed the data. The results of the study showed that 62.0 % of the children had good overall quality of life with about 37.7 and 49.8 percent good on nutritional and health, and children right aspects respectively. All of the samples were in the normal development scale at the tenth percentile cut of point. However, when the fiftieth percentile cut of point was used, only 27.8 % passed all activities of the development test. Majority of them (53.7 %) failed the hearing, language and concept development test and about 34.5 % failed the self- health skill test. It was also found that education, knowledge on child care, and child care practices of the mothers

fathers support

and birth weight was positively related to the overall quality of life of the children (p<0.05) while the number of children and child age was negatively related to the quality of life (p<0.05). About 23.2 % of the variation of the overall quality of life of the children could be explained by the ten selected predictors namely:- age, education, knowledge about child care, and child care practices of the mothers

number of children

family income

fathers support

age, gender and birth weight of the children. When the three aspects of the quality of life were considered, about 18.2, 29.2, and 13.1 percent of nutrition and health

intellectual mental emotion and social development

and the fundamental of children right cound be predicted by the above 10 selected predictors respectively. Among the ten predictors , children age (Beta(2) = .0676) mothers education (Beta(2) = .0289), and mothers age (Beta(2) =.0256) were the most three importion predictors of the overall quality of life. When the predictors variables of the three aspects were analysed, it was found that birth weight (Beta(2) =.0441) mothereducation (Beta(2) = .0400) and mothers child care practies (Beta(2)=.0195) were the most three importion predictors of the nutrition and health. Age of the child (Beta(2) =.2209), mothers education (Beta(2) =.0225) and number of children (Beta(2) =.0196), were the most three importion predictors of the developmental aspect. Mothers age (Beta(2) = .0256), gender of children (Beta(2) =.0225), previous residential area of mother (Beta(2) = .0225) and family income (Beta(2) =.0225) were the most three importion predictors of the fundamental childrens right aspect. The findings of this study recommended that the government should strengthen the health promotion program for the migrant labours by improving their education, knowledge about child care, child care practices. Father of the child should be motivated to be involved more in child care. Family planning and antinatal care program should be also strengthened.