The present disclosure relates to an air conditioner. An air conditioner according to one aspect of the present disclosure may comprise a case having a space therein; a front panel coupled to a front portion of the case and forming a suction port; a fan disposed in the case and rotating with respect to a rotational axis that extends in a front-rear direction; a discharge grille that is disposed at a position that a rotational direction of the fan is directed upward, the discharge grille through which air blown by the fan is discharged; and a guide disposed at the discharge grille and curved downward along a direction toward an outside of the case, thereby directing the discharged air to flow downward.