Toothed Belt and Manufacturing Method Therefor

A toothed belt comprising:

• a back portion in which a tension member extending along a belt circumferential direction is embedded;
• and
• a plurality of tooth portions formed on an inner circumferential surface of the back portion with intervals in the belt circumferential direction, wherein
• the toothed belt includes a back rubber layer formed on a belt outer circumferential side with respect to the tension member and a first rubber layer and a second rubber layer that are formed on a belt inner circumferential side with respect to the tension member,
• the back portion includes the back rubber layer,
• an elastic modulus of the first rubber layer is larger than an elastic modulus of the second rubber layer,
• the first rubber layer includes a first crosslinked rubber composition including a first rubber component and a first short fiber,
• a proportion of the first short fiber is 5 parts by mass to 60 parts by mass with respect to 100 parts by mass of the first rubber component,
• the first short fiber is oriented in a belt longitudinal direction along a contour of the tooth portion,
• the tension member includes a high elastic modulus fiber, and
• the tooth portion includes the first rubber layer and the second rubber layer that is interposed between the first rubber layer and the tension member.