Xanthan is a natural polysaccharide in powder form, created through the fermentation of sugar by the bacteria Xanthomonas campestris. In construction, Xanthan has been researched and applied in road and bridge construction materials, viscosity adjusting additives in self-compacting concrete... and in construction materials technology in general, Xanthan is used as a viscosity modifier, thickener... in concrete. In this study, the applicability of Xanthan in concrete was preliminarily evaluated. Through the results of squeeze - tack experiments to evaluate the rheological behavior of Xanthan pastes, the author conducted a compression test with concrete using Xanthan additive (2%), evaluating the change in strength of concrete when using Xanthan. The results show that Xanthan can be used in concrete to improve adhesion to the mold and increase the ability to easily peel off the mold. At the same time, using Xanthan in concrete with a content of 2% also contributes to increasing the compressive strength of concrete with an increase of 7%.