Little information is known about the nesting behaviour of arctic and boreal bumblebee species. The arctic is an environment with hard eco-climatic constraints notably for bumblebees. Here, we describe the nest of a common circum boreal species, Bombus lapponicus. A natural nest was discovered from an abandoned rodent nest (Microtus oeconomus) at 560 m. at Björkliden (Sweden) on June 14, 2021. The nest was 10 cm under the ground and at the end of a 1-meter-long sinuous tunnel. When discovered, the nest was wrapped in rodent straw and consisted of a nectar pot and 11 cells. The architecture of the brood had a horseshoe shape, consistent with other bumblebee nests already described. Before nest excavation, we observed the queen's comings and goings during a whole day to determine the time spent inside the nest to take care of the brood and the time spent outside to collect nutritive resources. The development of the brood was continued in the laboratory until the emergence of sexuates.