Fluorescence observation apparatus and fluorescence observation method

A fluorescence observation apparatus, comprising:

• a stage that is capable of supporting a fluorescently stained pathological specimen;
• an excitation section that irradiates the pathological specimen on the stage with a plurality of line illuminations of different wavelengths, the plurality of line illuminations being a plurality of line illuminations situated on different axes and being collimated by a collimator to a certain-axis direction;
• and
• a spectroscopic imaging section that includes at least one imaging device capable of separately receiving pieces of fluorescence respectively excited with the plurality of line illuminations, wherein optical axes of the plurality of line illuminations are parallel between an objective lens and the pathological specimen and wherein optical axes of the separately-received pieces of fluorescence are parallel when incident on the spectroscopic imaging section.