The study was conducted in the Entomology Research Field of Sylhet Agricultural University (SAU) campus, Sylhet and in the farmer’s field of Sreemangal, Moulvibazarduring October 2017 to April 2018 to determine the abundance and diversity of beneficial and harmful arthropod communities in bell pepper. In SAU campus, 822 beneficial arthropods of 9 insect species (ladybird beetle, ground beetle, ant, damselfly, preying mantid, long legged fly, hoverfly, ichneumonid wasp, braconid wasp) and 3 spider species (lynx spider, wolf spider and jumping spider) and 715 harmful arthropods of 6 insect species (aphid, jassid, common cutworm, thrips, flea beetle, sting bugs) and 2 mite species (broad mite and white mite) were found. In Sreemangal, 616 beneficial arthropods of 7 insect species (ladybird beetle, ground beetle, damselfly, ant, hoverfly, ichneumonid wasp, braconid wasp) and 2 spider species (lynx spider, wolf spider) and 740 harmful arthropods of 10 insect species (aphid, jassid, common cutworm, thrips, European corn borer, flea beetle, pepper weevil, leafminer, sting bug, whitefly) and 3 mite species (white mite, two spotted spider mite, broad mite) were found. Higher diversity index and richness of beneficial arthropods was found in SAU campus whereas, higher diversity index and richness of harmful arthropods was found in Sreemangal. The results clearly indicated that bell pepper habitat of research station is more suitable than those of farmer’s field.