An optical characteristic measuring device capable of simultaneously measuring flicker and an optical characteristic different from the flicker, comprising: a first light receiving sensor configured to measure the flicker; a first rear-stage circuit configured to have a signal output from the first light receiving sensor input thereto; a second light receiving sensor (6a, 6b, 6c) configured to measure the optical characteristic; a second rear-stage circuit(7a, 7b, 7c) configured to have a signal output from the second light receiving sensor input thereto; a switch unit (16,17) configured to selectively switch a first connection, a second connection and a third connection if the first connection is to connect an output of the first light receiving sensor and an input of the first rear-stage circuit and connect an output of the second light receiving sensor and an input of the second rear-stage circuit, the second connection is to connect the output of the first light receiving sensor and the input of the first rear-stage circuit and connect the output of the second light receiving sensor and the input of the first rear-stage circuit and the third connection is to connect the output of the first light receiving sensor and the input of the second rear-stage circuit and connect the output of the second light receiving sensor and the input of the second rear-stage circuit; and a mode control section configured to set a state of the first connection by controlling the switch unit in a first mode for simultaneously measuring the flicker and the optical characteristic, set a state of the second connection by controlling the switch unit in a second mode for measuring the flicker without measuring the optical characteristic and set a state of the third connection by controlling the switch unit in a third mode for measuring the optical characteristic without measuring the flicker. a first light receiving sensor configured to measure the flicker; a first rear-stage circuit configured to have a signal output from the first light receiving sensor input thereto; a second light receiving sensor (6a, 6b, 6c) configured to measure the optical characteristic; a second rear-stage circuit(7a, 7b, 7c) configured to have a signal output from the second light receiving sensor input thereto; a switch unit (16,17) configured to selectively switch a first connection, a second connection and a third connection if the first connection is to connect an output of the first light receiving sensor and an input of the first rear-stage circuit and connect an output of the second light receiving sensor and an input of the second rear-stage circuit, the second connection is to connect the output of the first light receiving sensor and the input of the first rear-stage circuit and connect the output of the second light receiving sensor and the input of the first rear-stage circuit and the third connection is to connect the output of the first light receiving sensor and the input of the second rear-stage circuit and connect the output of the second light receiving sensor and the input of the second rear-stage circuit; and a mode control section configured to set a state of the first connection by controlling the switch unit in a first mode for simultaneously measuring the flicker and the optical characteristic, set a state of the second connection by controlling the switch unit in a second mode for measuring the flicker without measuring the optical characteristic and set a state of the third connection by controlling the switch unit in a third mode for measuring the optical characteristic without measuring the flicker.