A portable air caring apparatus comprising: a housing portion which has an accommodation space formed therein and includes an inlet portion configured to suction air and an outlet portion configured to discharge air; a filter portion installed at an inner side of the housing portion that faces the inlet portion ; a fan module portion installed at an inner side of the housing portion that faces the outlet portion ; a filter case in which the filter portion is detachably installed and which is disposed between the filter portion and the fan module portion and configured to guide movement of air from the filter portion to the fan module portion ; and a sanitizing portion which is mounted on the filter case and configured to irradiate sanitizing light toward the filter portion , wherein air that enters through the inlet portion is guided in a horizontal direction so that the air sequentially passes through the filter portion , the filter case , and the fan module portion and then is discharged to the outside of the housing portion through the outlet portion , and wherein the filter case includes: a case main body portion which is fixed to the inside of the housing portion and in which the filter portion is mounted and both longitudinal sides are open; a flow path guiding portion which is installed at one side of the case main body portion and forms a path along which air moves from the filter portion toward the fan module portion ; and a fixing supporting portion which is disposed at the center of the flow path guiding portion , extends in the vertical direction, and includes a protrusion configured to support the sanitizing portion . a housing portion which has an accommodation space formed therein and includes an inlet portion configured to suction air and an outlet portion configured to discharge air; a filter portion installed at an inner side of the housing portion that faces the inlet portion ; a fan module portion installed at an inner side of the housing portion that faces the outlet portion ; a filter case in which the filter portion is detachably installed and which is disposed between the filter portion and the fan module portion and configured to guide movement of air from the filter portion to the fan module portion ; and a sanitizing portion which is mounted on the filter case and configured to irradiate sanitizing light toward the filter portion , wherein air that enters through the inlet portion is guided in a horizontal direction so that the air sequentially passes through the filter portion , the filter case , and the fan module portion and then is discharged to the outside of the housing portion through the outlet portion , and wherein the filter case includes: a case main body portion which is fixed to the inside of the housing portion and in which the filter portion is mounted and both longitudinal sides are open; a flow path guiding portion which is installed at one side of the case main body portion and forms a path along which air moves from the filter portion toward the fan module portion ; and a fixing supporting portion which is disposed at the center of the flow path guiding portion , extends in the vertical direction, and includes a protrusion configured to support the sanitizing portion . a case main body portion which is fixed to the inside of the housing portion and in which the filter portion is mounted and both longitudinal sides are open; a flow path guiding portion which is installed at one side of the case main body portion and forms a path along which air moves from the filter portion toward the fan module portion ; and a fixing supporting portion which is disposed at the center of the flow path guiding portion , extends in the vertical direction, and includes a protrusion configured to support the sanitizing portion . <EOS>