A cooling/warming device comprising: a case including a lower case and an upper case coupled to the lower case; a fan which is accommodated in the case and circulates air introduced into the case; a thermoelectric device which is accommodated in the case, is disposed on a side surface of the fan, cools some air generated by the fan, and heats the remaining air; and a controller which is connected to the thermoelectric device and the fan and controls operation of the thermoelectric device and the fan, wherein the thermoelectric device includes a first heat transmission member disposed at a side of the lower case, a second heat transmission member disposed at a side of the upper case, and a thermoelectric element disposed between the first heat transmission member and the second heat transmission member, wherein the thermoelectric element includes a first substrate disposed at a side of the first heat transmission member, a second substrate disposed at a side of the second heat transmission member, and a plurality of P-type thermoelectric legs and a plurality of N-type thermoelectric legs alternately disposed between the first substrate and the second substrate, the case includes an inlet through which air is introduced into the case, an air blow pipe through which air passing through the first heat transmission member flows, an air blow port from which the air flowing through the air blow pipe is discharged, a discharge pipe through which air passing through the second heat transmission member flows, and a discharge outlet from which the air flowing through the discharge pipe is discharged, and a bottom surface of the discharge pipe includes inclined regions having different heights at a predetermined point, wherein the bottom surface of the discharge pipe further includes a dividing region which divides the air passing through the first heat transmission member from the air passing through the second heat transmission member, a bent region which changes a path of the air passing through the second heat transmission member, and a discharge region from which the air passing through the second heat transmission member is discharged to the discharge outlet, and the inclined region is disposed between the bent region and the discharge region. a case including a lower case and an upper case coupled to the lower case; a fan which is accommodated in the case and circulates air introduced into the case; a thermoelectric device which is accommodated in the case, is disposed on a side surface of the fan, cools some air generated by the fan, and heats the remaining air; and a controller which is connected to the thermoelectric device and the fan and controls operation of the thermoelectric device and the fan, wherein the thermoelectric device includes a first heat transmission member disposed at a side of the lower case, a second heat transmission member disposed at a side of the upper case, and a thermoelectric element disposed between the first heat transmission member and the second heat transmission member, wherein the thermoelectric element includes a first substrate disposed at a side of the first heat transmission member, a second substrate disposed at a side of the second heat transmission member, and a plurality of P-type thermoelectric legs and a plurality of N-type thermoelectric legs alternately disposed between the first substrate and the second substrate, the case includes an inlet through which air is introduced into the case, an air blow pipe through which air passing through the first heat transmission member flows, an air blow port from which the air flowing through the air blow pipe is discharged, a discharge pipe through which air passing through the second heat transmission member flows, and a discharge outlet from which the air flowing through the discharge pipe is discharged, and a bottom surface of the discharge pipe includes inclined regions having different heights at a predetermined point, wherein the bottom surface of the discharge pipe further includes a dividing region which divides the air passing through the first heat transmission member from the air passing through the second heat transmission member, a bent region which changes a path of the air passing through the second heat transmission member, and a discharge region from which the air passing through the second heat transmission member is discharged to the discharge outlet, and the inclined region is disposed between the bent region and the discharge region.