A frame of an electric wheelchair according to the present invention comprises a frame body, a wheel system, and a driving device. The wheel system is coupled to side surfaces of the frame body. The wheel system comprises a power bracket and a linkage. The power bracket is connected to the frame body in a manner of swinging with respect to the frame body. The linkage is connected to the frame body in a manner of swinging with respect to the frame body. The linkage is connected to the power bracket in a manner of being pivotal and movable with respect to the power brae. The driving device comprises a coupling seat and a power supplier. The coupling seat is pivotally mounted to the power bracket. The power supplier is fixedly connected to the coupling seat. The power supplier is provided with a driving axle. The driving axle extends in a direction away from the frame body. With the above structure, when a driving wheel encounters a road surface bump, the comfortableness of a user sitting on the electric wheelchair can be improved by making the coupling seat pivotally swing with respect to the power bracket.本發明電動輪椅之車架包括有一個架體、一個輪系組及一個驅動裝置，輪系組連接於架體的側面，輪系組包括有一個動力支架及一個輹連桿，動力支架能夠相對架體擺動地連接於架體，輹連桿能夠相對架體擺動地連接於架體，輹連桿夠相對動力支架樞轉及移動地連接於動力支架，驅動裝置包括有一個連接座及一個動力輸出機，連接座樞設於動力支架，動力輸出機固定連接於連接座，動力輸出機設置有一個驅動軸，驅動軸往遠離架體的方向延伸，車架利用上述結構，當驅動輪遭遇路面隆起時，能夠利用連接座相對動力支架樞擺的方式提升使用者乘坐電動輪椅時的舒適性。
