[en] This report is based on the results of the activities by the e⁺e^- working group. The purposes of the report are to survey the scientific interest on and the feasibility of the experiment with e⁺e^- linear colliders in TeV energy region, to clarify the development goal of the detector technology required for such high energy experiment, and to suggest the desirable performance parameters for e⁺e^- linear colliders. Various processes relevant to e⁺e^- reaction and predicted by the standard electroweak theory provide good channels to test the standard model itself. The luminosity of 10³²/cm².sec is necessary. It is possible to search for new particles and/or interactions which are expected to have relatively large cross sections. If the luminosity of 10³³/cm².sec will be obtained, the search for supersymmetric particles and/or Higgs particles will become possible. The final beam energy must be aimed as high as possible since the threshold energy is not predictable. The beam energy spread of about 10% is tolerable as an initial experiment. The spread of 1% will be required when the threshold or peak energy of new particles will be located. Three general aspects of e⁺e^- collider experiment in the TeV energy region are particle multiplicity, inclusive hadron momentum spectra and di-jet invariant mass reconstruction. The most important single device of e⁺e^- colliders in TeV energy region will be calorimeters which are superior momentum analyzers to magnetic spectrometers. It is highly desirable to develop a new technique for precision tracking device as well as calorimeters. (Kato, T.)