Base polymer for hot melt adhesive

[1] A base polymer for a hot melt adhesive containing a propylene polymer (A) having a tensile modulus of elasticity of 60 MPa or higher and an olefin polymer (B) having a tensile modulus of elasticity of less than 60 MPa in which, relative to 100 parts by mass of the total propylene polymer (A) and olefin polymer (B) content, the propylene polymer (A) content is at least 1 part by mass to less than 50 parts by mass and the olefin polymer (B) content is more than 50 parts by mass to no more than 99 parts by mass; and [2] a hot melt adhesive containing this base polymer, and at least one among (C) a tackifying resin, and (D) an oil.