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 configured to measure the optical characteristic; a second rear-stage circuit configured to have a signal output from the second light receiving sensor input thereto; a switch unit 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 (S3) by controlling the switch unit in a first mode for simultaneously measuring the flicker and the optical characteristic (S4), set a state of the second connection (S7) by controlling the switch unit in a second mode for measuring the flicker without measuring the optical characteristic (S8) and set a state of the third connection (S11) by controlling the switch unit in a third mode for measuring the optical characteristic without measuring the flicker (S12). 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 configured to measure the optical characteristic; a second rear-stage circuit configured to have a signal output from the second light receiving sensor input thereto; a switch unit 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 (S3) by controlling the switch unit in a first mode for simultaneously measuring the flicker and the optical characteristic (S4), set a state of the second connection (S7) by controlling the switch unit in a second mode for measuring the flicker without measuring the optical characteristic (S8) and set a state of the third connection (S11) by controlling the switch unit in a third mode for measuring the optical characteristic without measuring the flicker (S12). <EOS>