An assist device for stretching feet includes a wearable unit and a stretching module. The wearable unit includes a first side, a second side and a heel-supporting part. The heel-supporting part is disposed between the first side and the second side to define a heel-supporting space. The first side has a first connecting portion. The second side has an extending portion. The extending portion extends away from the heel-supporting part and forms a second connecting portion. The stretching module includes a stretching strip and an adjustment mechanism. The stretching strip is connected to the second connecting portion by the adjustment mechanism. The stretching strip defines a front-sole supporting space adjoining the heel-supporting space.一種輔助足部拉伸的裝置,包含一穿戴件及一拉伸模組。所述穿戴件包含一第一側、一第二側及一腳跟支撐部,所述腳跟支撐部位於所述第一側與所述第二側之間,以界定一腳跟支撐空間,所述第一側有一第一連接部,所述第二側有一延伸部,所述延伸部相對所述腳跟支撐部往一前側延伸有一第二連接部,使所述第二連接部偏離所述腳跟支撐部。所述拉伸模組包含一拉伸帶及一調整機構,所述拉伸帶是藉由所述調整機構連接至所述第二連接部,所述拉伸帶界定一前腳掌支撐空間,所述前腳掌支撐空間相鄰所述腳跟支撐空間。