A fan structure used for connecting with a plate body includes a main body, a fan blade, a sliding member and a locating member. The main body has an accommodating space and an adjustment slot. The fan blade is pivotally disposed on the main body and is located inside the accommodating space. The sliding member has a base and a joining portion. The base is accommodated in the adjustment slot. The sliding member is joined to the plate body through the joining portion. The locating member is used for joining the sliding member and the main body together, so as to fix the relative position of the sliding member and the main body.