An air conditioning control device (1, 101) that collectively controls the operation of an indoor unit group constituted by a plurality of indoor units (30a, 30b,..., 30y, 130a, 130b,..., 130y) of an air conditioner installed in a single space (A, B), comprising: an operating-unit specifying unit (11, 111) configured to specify, among the indoor units (30a, 30b,..., and 30y, 130a, 130b,..., 130y) included in the indoor unit group, an operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 130l) that is an indoor unit to perform an air conditioning operation in an air conditioning target space (M, N) forming a portion of the space (A, B); an adjacent-unit specifying unit (12, 112) configured to specify, among the indoor units (30a, 30b,..., and 30y, 130a, 130b,..., 130y) included in the indoor unit group, an adjacent unit (30a to 30c, 30i, 30n, 30s, 30u to 30w, 130f to 130h, 130m, 130p to 130r) that is an indoor unit adjacent to the operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 1301); an operating-unit control unit (13, 113) configured to cause the operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 1301) to perform the air conditioning operation; and an adjacent-unit control unit (14, 114), characterized by the adjacent-unit control unit (14, 114) being configured to cause the adjacent unit (30a to 30c, 30i, 30n, 30s, 30u to 30w, 130f to 130h, 130m, 130p to 130r) to perform an air flow generating operation to generate an air flow directed downward and forming an air curtain enveloping the air conditioning target space (M, N) and inhibiting air conditioned by the air conditioning operation of the operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 1301) from diffusing from the air conditioning target space (M, N) which is targeted by the air conditioning operation of the operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 1301). an operating-unit specifying unit (11, 111) configured to specify, among the indoor units (30a, 30b,..., and 30y, 130a, 130b,..., 130y) included in the indoor unit group, an operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 130l) that is an indoor unit to perform an air conditioning operation in an air conditioning target space (M, N) forming a portion of the space (A, B); an adjacent-unit specifying unit (12, 112) configured to specify, among the indoor units (30a, 30b,..., and 30y, 130a, 130b,..., 130y) included in the indoor unit group, an adjacent unit (30a to 30c, 30i, 30n, 30s, 30u to 30w, 130f to 130h, 130m, 130p to 130r) that is an indoor unit adjacent to the operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 1301); an operating-unit control unit (13, 113) configured to cause the operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 1301) to perform the air conditioning operation; and an adjacent-unit control unit (14, 114), characterized by the adjacent-unit control unit (14, 114) being configured to cause the adjacent unit (30a to 30c, 30i, 30n, 30s, 30u to 30w, 130f to 130h, 130m, 130p to 130r) to perform an air flow generating operation to generate an air flow directed downward and forming an air curtain enveloping the air conditioning target space (M, N) and inhibiting air conditioned by the air conditioning operation of the operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 1301) from diffusing from the air conditioning target space (M, N) which is targeted by the air conditioning operation of the operating unit (30f to 30h, 30k to 30m, 30p to 30r, 130k, 1301).