The invention discloses an office chair convenient for teaching. The office chair comprises a sitting board, wherein a base is arranged below the sitting board; a lifting column is fixed at the middleposition of the upper end of the base; an adjusting handle is arranged on the outer side of the lifting column; the upper end of the lifting column is connected and fixed with the bottom of the sitting board; a back plate is arranged on the inner side of the upper end of the sitting board; a massage board is arranged on the back plate; a plurality of massage bumps are uniformly distributed on thesurface of the massage board and are semicircular bumps; a lifting groove is formed in the upper end of the back plate; a lifting plate is arranged in the lifting groove in a sliding manner; a backrest is arranged at the upper end of the lifting plate. The office chair disclosed by the invention is simple and reasonable in structure; an auxiliary sitting board is accommodated in a storage cavitywhen being not used. The built-in arrangement mode has no influence on an outer pipe of the device; the auxiliary sitting board is extracted from the storage cavity when needing to be used and then supporting legs are rotated to a vertical state, so that a supporting pad props against the ground, further a two-seat integrating effect is realized, the defects of the existing seat are overcome and high practicality is realized.