Purpose. In this study we evaluated the doses for organs at risk (lungs, heart, spinal cord) and CTV-PTV volume at 3D-conformal radiotherapy (3DCRT, ISRT) and intensity-modulated radiotherapy (IMRT) for mediastinal stage II HL (30-36Gy). Patients and methods. From March 2014 to March 2015 63 patients with mediastinal stage II HL had chemotherapy 3-4 cycles ABVD than there was 3DCRT: 52 patients – involved site radiation therapy (ISRT) and 11 patients – IMRT. We compared CTV-PTV volumes and the doses to organs at risk in these groups. Results. CTV volume was not distinguished (401 ± 15,0 cm3 and 385 ± 61,5 cm3). PTV was significantly more at ISRT than IMRT-groupe (1270 ± 84,0 cm3 and 604 ± 89,0 cm3, p< 0,01). Besides, at IMRT-groupe were less compared with ISRT-groupe V20 left lung (24,0 ± 3,8 % and 33,5 ± 1,4%, p< 0,05), right lung (28,0 ± 1,3 % and 16,6 ± 2,4 %, p< 0,05), V30 heart (50,0 ± 4,4% and 8,1 ± 2,2 %, p< 0,01), mean heart dose (29,4 ± 3,8 Gy and 7,0 ± 1,5 Gy, p< 0,001). Mean dose for spinal cord was similar in these groups. Conclusion. IMRT compared to 3DCRT (ISRT) substantially reduces V20 lungs, V30 heart and mean dose for heart without compromising the dose to the target in patients with mediastinal stage II HL.