タイトル: Primordial Black Hole Cosmology アブストラクト: After aLIGO detected the gravitational wave produced by mergers of binary black holes (BHs), researchers have aggressively studied the origin of the BHs with masses of the order of O(10) M_sun. In addition to astrophysical origins through evolutions of Pop.III/Pop.II stars, one of the attractive candidates of those BHs should be Primordial Black Holes (PBHs). The PBHs can be normally produced in the early radiation dominated Universe due to spherical collapses of regions which have a large density perturbation. I will review the current status of cosmological and astrophysical constraints on PBHs with introducing my own recent bounds on PBHs in terms of accretions of baryon onto PBHs (in progress), polarization of CMB photons (arXiv:1707.04206 [astro-ph.CO]), Higgs phenomenology (arXiv:1708.02138 [hep-ph]) and so on. In addition, I will discuss a new production mechanism of a PBH in the early matter dominated Universe with taking a serios attitude towards a suppression due to conservations of angular momentum during its collapsing phase (arXiv:1707.03595 [gr-qc]) and possible applications of this mechanism to cosmology.