In this review, we have presented recent high-resolution photoemission results by using the ultra-violet laser as an excitation source. Due to the narrow band width of the light source and the improvement of the detection system, the overall instrumental resolution was improved up to 0.35 meV. Low energy excitation allows us obtaining the more bulk-sensitive measurements than the conventional high-resolution photoemission spectroscopy. These advantages appeared on some recent results on superconductors (Nb and Mg (B_(1-x)C_x)_2) and other correlated materials (FeSi and LiV_2O_4). Angle-resolved photoemission of Bi_2Sr_2CaCu_2O_(8+δ) shows very sharp spectra, which allows us to discuss much more intrinsic electronic structure. These results demonstrate the promising future of the high-resolution and low energy excitation photoemission spectroscopy.%光電子分光法の持つ最も大きな利点は電子状態を直接的にrn得ることができる点にあろう．既知のエネルギーhvを持つrn単色光を物質に照射し，出てきた光電子の運動エネルギーrnE_kを計測すると，物質内における電子の結合エネルギーE_Brnは物質の仕事関数φを用いてエネルギー保存則からrnE_B＝hv-E_k-φ （1）で与えられる．
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