Aim: The aim of the present study was to evaluate whether pulmonary artery size is indicator of pulmonary hypertension in patients with interstitial lung disease. Methods: A total of 30 patients with interstitial lung disease were included in this study who was subjected to CT chest and 2DECHO after obtaining the consent. Institutional ethics committee approval was obtained. Results: Patients were mostly 40–59 years old. The research included 20 men and 10 women. Twelve individuals had 3.5-3.99 cm pulmonary arteries in this investigation. In the ILD group with pulmonary hypertension, the mean pulmonary arterial diameter was 34.66 ±1.60 mm, whereas patients without hypertension had a mean of 31.38±3.47 mm. Positive correlation between dilated pulmonary artery and 2Decho results (Pearson coefficient r=0.72 p<.01). In interstitial lung disorders, dilated pulmonary arteries suggest pulmonary hypertension. On 2D Echo, 13 of 23 patients with dilated pulmonary arteries had suspected pulmonary hypertension, whereas 10 were negative. On 2D Echo, only one of 7 patients without dilated pulmonary arteries had suspected pulmonary hypertension. Conclusion: Pulmonary hypertension may be suspected in interstitial lung disorders with dilated pulmonary arteries. Thus, pulmonary artery diameter is crucial for pulmonary hypertension screening.