A support rack includes a support plate, a support stand, a locking member, a pen holder, an indication member, and two auxiliary clips. Thus, the support rack functions as a clipboard, a book rack, an exhibition rack, a price indication rack, a pen holder or the like, thereby enhancing the versatility of the support rack. In addition, the support stand is adjustably mounted on the locking member so as to adjust the inclined angle between the support plate and the support stand, thereby facilitating a user adjusting the inclined angle of the support rack to the optimum extent.