A traveling vehicle system comprising: a traveling rail (31, 32) including a first rail member (31A, 32A) and a second rail member (31B, 32B) extending horizontally; a first traveling vehicle and a second traveling vehicle configured to travel on the traveling rail (31, 32); a first detectable part (35A, 35B) provided with the first rail member (31A, 32A) and extending along an extending direction of the traveling rail (31, 32); a second detectable part (35B, 36B) provided with the second rail member (31B, 32B) and extending along the extending direction of the traveling rail (31, 32); a first detector (85A, 85B) provided with the first traveling vehicle and configured to detect the first detectable part (35A, 35B); and a second detector (87A, 87B) provided with the second traveling vehicle and configured to detect the second detectable part (35B, 36B), wherein along the traveling rail (31, 32), a first area where the first traveling vehicle is able to travel and the second traveling vehicle is unable to travel; a second area where the second traveling vehicle is able to travel and the first traveling vehicle is unable to travel; and a shared area, provided between the first area and the second area, where both the first traveling vehicle and the second traveling vehicle are able to travel are formed, the shared area is provided with a connecting portion in which the first rail member (31A, 32A) and the second rail member (31B, 32B) are connected with a gap therebetween or so as to be in contact with each other, the first detectable part (35A, 35B) is disposed at a position detectable by the first detector (85A, 85B) and the second detectable part (35B, 36B) is disposed at a position undetectable by the first detector (85A, 85B) when the first traveling vehicle is located in a first position being at an end of the first rail member (31A, 32A) closer to the connecting portion in the shared area, and the second detectable part (35B, 36B) is disposed at a position detectable by the second detector (87A, 87B) and the first detectable part (35A, 35B) is disposed at a position undetectable by the second detector (87A, 87B) when the second traveling vehicle is located in a second position being at an end of the second rail member (31B, 32B) closer to the connecting portion in the shared area. a traveling rail (31, 32) including a first rail member (31A, 32A) and a second rail member (31B, 32B) extending horizontally; a first traveling vehicle and a second traveling vehicle configured to travel on the traveling rail (31, 32); a first detectable part (35A, 35B) provided with the first rail member (31A, 32A) and extending along an extending direction of the traveling rail (31, 32); a second detectable part (35B, 36B) provided with the second rail member (31B, 32B) and extending along the extending direction of the traveling rail (31, 32); a first detector (85A, 85B) provided with the first traveling vehicle and configured to detect the first detectable part (35A, 35B); and a second detector (87A, 87B) provided with the second traveling vehicle and configured to detect the second detectable part (35B, 36B), wherein along the traveling rail (31, 32), a first area where the first traveling vehicle is able to travel and the second traveling vehicle is unable to travel; a second area where the second traveling vehicle is able to travel and the first traveling vehicle is unable to travel; and a shared area, provided between the first area and the second area, where both the first traveling vehicle and the second traveling vehicle are able to travel are formed, the shared area is provided with a connecting portion in which the first rail member (31A, 32A) and the second rail member (31B, 32B) are connected with a gap therebetween or so as to be in contact with each other, the first detectable part (35A, 35B) is disposed at a position detectable by the first detector (85A, 85B) and the second detectable part (35B, 36B) is disposed at a position undetectable by the first detector (85A, 85B) when the first traveling vehicle is located in a first position being at an end of the first rail member (31A, 32A) closer to the connecting portion in the shared area, and the second detectable part (35B, 36B) is disposed at a position detectable by the second detector (87A, 87B) and the first detectable part (35A, 35B) is disposed at a position undetectable by the second detector (87A, 87B) when the second traveling vehicle is located in a second position being at an end of the second rail member (31B, 32B) closer to the connecting portion in the shared area.