It will take me many many weeks of wear to find out if this shoe will help with plantar fasciitis, but there is arch support, as are this company's sandals that I have been wearing for some time. I read the reviews about sizing issues and ordered a half size larger than I wear and that was a mistake. These shoes were not small so I had to order my normal size. They're comfortable shoes, and for those of us with plantar fasciitis issues, when they work like sandals, this is the answer.