A microscope apparatus includes a microscope, and a time-resolved spectroscopy unit, a first light-guiding unit for guiding light from the speetroscopy unit into the microscope, a second light-guiding unit for guiding the light from the microscope into the spectroscopy unit. The microscope includes an illuminating optical system and an observing optical system. The time-resolved spectroscopy unit includes an ultrashort optical pulse source, a beam splitter for splitting the ultrashort optical pulse into a reference beam and another beam, an optical system for generating a pump beam and a probe beam from the beam other than the reference beam, and an imaging device for time-resolved spectroscopy for capturing an interference pattern formed by the light guided by the second light-guiding unit and the reference beam. A two-dimensional lightwave conversion optical system is interposed between the second light-guiding unit and the imaging device.