An autonomous travel system comprising: a first travel route creation unit capable of creating a first travel route that is a travel route for allowing a work vehicle to travel in a field, and includes a plurality of first straight routes disposed at an interval so as to be within the field, and a turning route for connecting the first straight routes; a second travel route creation unit capable of creating a second travel route that is a travel route for allowing the work vehicle to travel in the field, and includes only a plurality of second straight routes disposed at an interval; an interlocking route creation unit having at least one of a function of creating the second travel route by creating the second straight routes each having at least a part overlapped with the first straight route in conjunction with creation of the first travel route by the first travel route creation unit, and a function of creating the first travel route including the first straight routes overlapped with the second straight routes in conjunction with creation of the second travel route by the second travel route creation unit; a storage unit arranged to store the travel route created by the first travel route creation unit or the second travel route creation unit, and the travel route created by the interlocking route creation unit in association with each other; a route selection unit arranged to selectively select the first travel route or the second travel route in accordance with an input instruction; and a travel control unit arranged to cause the work vehicle to autonomously travel along at least a part of the first travel route or the second travel route selected by the route selection unit. a first travel route creation unit capable of creating a first travel route that is a travel route for allowing a work vehicle to travel in a field, and includes a plurality of first straight routes disposed at an interval so as to be within the field, and a turning route for connecting the first straight routes; a second travel route creation unit capable of creating a second travel route that is a travel route for allowing the work vehicle to travel in the field, and includes only a plurality of second straight routes disposed at an interval; an interlocking route creation unit having at least one of a function of creating the second travel route by creating the second straight routes each having at least a part overlapped with the first straight route in conjunction with creation of the first travel route by the first travel route creation unit, and a function of creating the first travel route including the first straight routes overlapped with the second straight routes in conjunction with creation of the second travel route by the second travel route creation unit; a storage unit arranged to store the travel route created by the first travel route creation unit or the second travel route creation unit, and the travel route created by the interlocking route creation unit in association with each other; a route selection unit arranged to selectively select the first travel route or the second travel route in accordance with an input instruction; and a travel control unit arranged to cause the work vehicle to autonomously travel along at least a part of the first travel route or the second travel route selected by the route selection unit.