Abstract. The Bagek Kembar mangrove ecotourism area, Sekotong, West Lombok has been designated as one of the mangrove essential ecosystem area in West Nusa Tenggara. One of the ecological services of a mangrove ecosystem is a carbon storage. Mangrove forest have the ability to store carbon 4 times higher than the world’s tropical rainforest. This study aims to assess the amount of carbon stored in  mangrove stands in the Bagek Kembar mangrove ecotourism area, Sekotong West Lombok. This study uses a random sampling method, which is the placement of random plots in each mangrove zoning. The mangrove zoning is devided based on the distance from the sea and the river starting from 50 meters, 100 meters, 150 meters, 200 meters, 250 meters, and 300 meters. In addition, the mangrove area was devided into two mangrove statuses namely natural mangrove succession and rehabilitation and 10% of the 10x10 meter observation plot sample was taken. So that there were 286 observation plots obtained. Calculation of mangrove biomass using allometric equations. The results of the estimation study of carbon deposits on mangrove stand biomass in the Bagek Kembar Mangrove Ecotourism area of a total 6 zoning amounted to 5467.907 tons/ha.