An image forming device is disclosed that can control image blurring, image contraction, and the like when resilient transfer media such as cardboard is to be transported upward from a pair of resist rollers and guided to a transfer position, and obtain a suitable transfer image. Transfer media is transported upward by resist rollers, and guided toward a transfer position by a pair of guide plates. Because tip of a resilient transfer medium such as cardboard may spring back to its original shape after it separates from the resist rollers, one guide plate is urged toward the transfer position by spring members, and can absorb the springing of the transfer media back to its original shape by pivoting away from the transfer position, and thus can reduce the occurrences of image blurring or the like.