A calcium phosphate porous sintered body which comprises spherical pores communicating with one another substantially throughout the body with a porosity of 55% or more and 90% or less, and has an average diameter of the inter-pore communicating parts of 50 μm or more, a pore diameter of 150 μm or more, and a three-point bending strength of 5 MPa or more, and a method for producing the same