Abstract: BACKGROUND: The pulmonary function tests (PFT) are known predictors of clinical outcome in respiratory disorders. Several recent studies have shown inverse correlation between PFT and certain haematological parameters like red cell distribution width (RDW) independent of confounding factors like smoking. This study was taken up to find out if there is any direct correlation between PFT and certain haematological parameters in healthy non-smokers. METHODS: The study was carried out on 200 healthy non-smokers aged between 20 and 55 years. In all the subjects PFTs were performed and common haematological parameters like haemoglobin, RDW, MCV, MCH, MCHC and derived ratios were determined. The correlation between PFT and haematological parameters were statistically analysed. RESULTS & CONCLUSIONS: Despite the absence of pulmonary illness, the mean values for PFT in the study subjects were lower than the predicted range. There was no correlation between PFT and any one of the haematological parameters studied. In healthy non-smokers, PFT does not appear to have a direct effect on any one of the haematological parameters or vice versa