A mobile body which travels, driven by a driving device according to an input to an operating device by an occupant of the mobile body, wherein the mobile body includes: a detecting device which detects an object existing around the mobile body; and a control device which controls the mobile body to travel by controlling a driving amount of the driving device based on an input information which is an information inputted to the operating device, wherein the control device includes: a standard suppression area setting portion (62b, 162b) which sets a standard suppression area (Rb) which is a criteria for determining a suppression area where a travelling of the mobile body is suppressed when the object positioning in the suppression area is detected by the detecting device; and a reduced suppression area setting portion (62c, 162c) which sets a reduced suppression area (Rr, Rr1 and Rr2) which area is reduced relative to the standard suppression area (Rb) set by the standard suppression area setting portion (62b,162b) based on a release request to a suppression of the travelling of the mobile body by an operation of the occupant of the mobile body or a type of the object positioning in a surrounding area (Rs) of the mobile body at both side areas of a predicted travelling course area (Wy) of the mobile body, wherein the mobile body further includes a release request detecting device which detects a strength of the release request by the operation of the occupant, characterised in that the control device further includes an area switching over portion which switches over the suppression area from the standard suppression area (Rb) set by the standard suppression area setting portion to the reduced suppression area (Rr1 and Rr2) set by the reduced suppression area setting portion, based on the strength of the release request detected by the release request detecting device; and the reduced suppression area setting portion sets the reduced suppression area (Rr1 and Rr2) such that the stronger the release request detected by the release request detecting device, the smaller the reduced suppression area becomes. a detecting device which detects an object existing around the mobile body; and a control device which controls the mobile body to travel by controlling a driving amount of the driving device based on an input information which is an information inputted to the operating device, wherein the control device includes: a standard suppression area setting portion (62b, 162b) which sets a standard suppression area (Rb) which is a criteria for determining a suppression area where a travelling of the mobile body is suppressed when the object positioning in the suppression area is detected by the detecting device; and a reduced suppression area setting portion (62c, 162c) which sets a reduced suppression area (Rr, Rr1 and Rr2) which area is reduced relative to the standard suppression area (Rb) set by the standard suppression area setting portion (62b,162b) based on a release request to a suppression of the travelling of the mobile body by an operation of the occupant of the mobile body or a type of the object positioning in a surrounding area (Rs) of the mobile body at both side areas of a predicted travelling course area (Wy) of the mobile body, wherein a standard suppression area setting portion (62b, 162b) which sets a standard suppression area (Rb) which is a criteria for determining a suppression area where a travelling of the mobile body is suppressed when the object positioning in the suppression area is detected by the detecting device; and a reduced suppression area setting portion (62c, 162c) which sets a reduced suppression area (Rr, Rr1 and Rr2) which area is reduced relative to the standard suppression area (Rb) set by the standard suppression area setting portion (62b,162b) based on a release request to a suppression of the travelling of the mobile body by an operation of the occupant of the mobile body or a type of the object positioning in a surrounding area (Rs) of the mobile body at both side areas of a predicted travelling course area (Wy) of the mobile body, wherein the mobile body further includes a release request detecting device which detects a strength of the release request by the operation of the occupant, characterised in that the control device further includes an area switching over portion which switches over the suppression area from the standard suppression area (Rb) set by the standard suppression area setting portion to the reduced suppression area (Rr1 and Rr2) set by the reduced suppression area setting portion, based on the strength of the release request detected by the release request detecting device; and the reduced suppression area setting portion sets the reduced suppression area (Rr1 and Rr2) such that the stronger the release request detected by the release request detecting device, the smaller the reduced suppression area becomes.