An image processing apparatus capable of improving operability of a question preparer. The image processing apparatus including a memory device that stores instructions, and a processor that executes the instructions to: generate a question sheet image by controlling a reading unit to read a question sheet in which question sentences and question numbers are written, generate an answer sheet image by controlling the reading unit to read an answer sheet that includes answer fields, question numbers corresponding to the answer fields, and marks showing marking results, detect an answer field including a wrong answer mark from the answer sheet image, obtain a question number corresponding to the detected answer field from the answer sheet image, obtain a question sentence corresponding to the obtained question number from the question sheet image, and generate a review image including the obtained question sentence and a new answer field.