Outsole and shoe

An outsole comprising:

• at least one sheet body,
• the sheet body comprising a substrate sheet and an injection molded article that is obtained by injection molding of a resin composition directly to the substrate sheet,
• the injection molded article being fixed directly to the substrate sheet by injection molding,
• the resin composition comprising a thermoplastic resin, and
• the resin composition having, when a thermal melting temperature is set to T(° C.), a melt viscosity at a shear rate of at least 100 (sec−1) in at least part of a temperature range of (T+0° C.) to (T+50° C.) satisfying formula (1) below
• η100≤900 Pa·s (1);
• wherein the injection molded article comprises a continuous body of said resin composition having a plurality of protruding portions extending toward a ground engaging surface and a plurality of connecting members of said resin composition each connecting adjacent ones of the protruding portions, and
• wherein the resin composition is represented by an approximate straight line shown in formula (2) below according to a measurement result obtained by measuring the melt viscosity by changing the shear rate from 100 (sec−1) to 2500 (sec−1) at any temperature in the temperature range satisfying the formula (1) above
• Log10η=−A·log10D+C (2);
• (wherein “η” represents the melt viscosity (Pa·s), “D” represents the shear rate, “A” represents a slope of the approximate straight line having a magnitude of more than 0 and not more than 350, and “C” represents an intercept of the approximate straight line).