This record mainly upload all the experimental data related to the main text of the manuscript “Multiple mobile excitons manifested as sidebands in quasi-one- dimensional metallic TaSe3”. Fig.1 contains the crystal structure (vesta format), experimental Fermi surfaces, and band structure of TaSe3 (txt format). Fig.2 contains the calculated band structure along XS direction, ARPES band structure along XS direction recorded with hv=40eV (txt format). Fig.3 contains the data of three  ARPES spectra along XS direction recorded with CP, LH polarisations at 40 eV and CP at 37 eV, respectively. Fig.4 does not have any raw data.