The Leuweung Sancang Nature Reserve has a unique type of mangrove known as Kaboa (Aegiceras corniculatum). Kaboa is known as an endemic plant in the Sancang Beach area because of the myths and legends it has. The proof is that currently, the number of kaboa presence on Sancang Beach has begun to decrease. The cause of the decline in kaboa is closely related to the level of conservation knowledge possessed by the community. Research on the level of public knowledge regarding the conservation of the kaboa plant needs to be carried out. This research uses a descriptive quantitative method. The research was conducted in four villages namely Sancang Village, Sagara Village, Karyamukti Village, and Karyasari Village. The research instrument used a questionnaire with a Thurstone Scale score given to 100 respondents from the four selected villages using a purposive sampling technique. The results showed that 65% of the people had good knowledge, 28% of the people had sufficient knowledge, and 7% of the people had less knowledge about the conservation of the kaboa plant. The level of public knowledge on each indicator of use, maintenance, and supervision is in a good category. Most people already have good knowledge about the conservation of kaboa plants. However, there needs to be other efforts made by related parties including the government in it to increase public knowledge.