One-dimensional GC-MS/olfactory analysis and two-dimensional GC-MS/olfactory analysis can be freely performed in one analyzer by a simple switching operation, without changing the device configuration. An odor component analyzer is used which includes a sample injection port equipped with a pressure control device, a GC first dimensional column connected to the sample injection port, a three-way connector T1-2 connected to the GC first dimensional column, three-way connectors T1-1, T1-3 each connected to the three-way connector T1-2, a solenoid valve connected to the three-way connectors T1-1, T1-3 and serving to adjust flow channels of the three-way connectors T1-1, T1-3, a first pressure control device connected to the solenoid valve, a three-way connector T2-1 connected to the three-way connector T1-3, a second pressure control device connected to the three-way connector T2-1, a three-way connector T2-2 connected to the three-way connector T2-1, a three-way connector T2-3 connected to the three-way connector T2-2, a mass analyzer and an olfactory device each connected to the three-way connector T2-3, and a GC second dimensional column connected to the three-way connector T1-1 and the three-way connector T2-2.