The present invention addresses the problem of providing a porous sheet and a porous composite comprising the porous sheet, in particular, a porous sheet and porous composite for clothing, health articles, medical articles and sports articles, the porous sheet exhibiting good fitting, non-tightness and comfort directly after wearing or when stationary/resting, while also exhibiting tightness, fixation and stability properties and comfort during activities such as sport. The present invention pertains to a porous sheet comprising a thermoplastic elastomer composition (A), and having a pluralityof slits and/or pores, the porous sheet having a porosity of 5-80%, an anisotropic rate of at least 10%, and a stretch stress relaxation rate of at most 40% after being stretched to 500% and held for60 seconds.