Objectives: to describe the prevalence of backache among groups with long and normal working day.

Design: A cross sectional study of prevalence of backache among groups with long and normal working day.

Materials and Method: Among the 19 wards of Kirtipur municipality, ward no. 11 was selected as a random cluster.64 households of different socioeconomic status were selected at random. Total of 64 individuals from these households were selected in the study.

Conclusion: The backache was found to be 62.5% prevalent. 75.8% of individuals in long working day category were found to be suffering from backache whereas 48.4% in normal working day group were suffering from it.