A fitting assembly for corrugated tubing, the fitting assembly comprising a first sleeve part being attachable to an object to which a corrugated tube is to be connected and a second sleeve part configured to be fitted in to the first sleeve part and to which the corrugated tube is sealably attachable, and in which fitting assembly: - the first sleeve part comprises a receiving end for receiving the second sleeve part and an attachment end being attachable to an opening formed to an object to which the fitting assembly is to be attached; - the second sleeve part comprises a receiving portion sealably connectable to the first sleeve part; - the fitting assembly comprises attachment means (22, 26, 27) for attaching and sealing the corrugated tube to the second sleeve part such that when the second sleeve part is attached to the first sleeve part, the corrugated tube extends outside the fitting assembly through the attachment end of the first sleeve part; - the fitting assembly comprises two sealing members for sealing the connection between the first sleeve part and the second sleeve part and/or the first sleeve part and the corrugated tube which said two sealing members are located in grooves of the second sleeve part; - the fitting assembly comprises further two sealing members for sealing the connection between the second sleeve part and the corrugated tube which said two sealing members for sealing the connection between the second sleeve part and the corrugated tube, in use are located between corrugations of said corrugated tube; - the fitting assembly comprises further at least one attachment member of said attachment means for attaching the corrugated tube in to the fitting assembly such that the corrugated tube is sealably connected to the second sleeve part; wherein - the attachment member is a locking ring configured to be fitted in a corrugation of said corrugated tube and between the outer side of the corrugated tube and a locking corner of the first sleeve part; - the coupling end of the second sleeve part abuts against the locking ring; - the locking ring is separate from the sealing members (25, 26) as well as the locking ring is in abutting relationship with both, the first sleeve part and the second sleeve part. - the first sleeve part comprises a receiving end for receiving the second sleeve part and an attachment end being attachable to an opening formed to an object to which the fitting assembly is to be attached; - the second sleeve part comprises a receiving portion sealably connectable to the first sleeve part; - the fitting assembly comprises attachment means (22, 26, 27) for attaching and sealing the corrugated tube to the second sleeve part such that when the second sleeve part is attached to the first sleeve part, the corrugated tube extends outside the fitting assembly through the attachment end of the first sleeve part; - the fitting assembly comprises two sealing members for sealing the connection between the first sleeve part and the second sleeve part and/or the first sleeve part and the corrugated tube which said two sealing members are located in grooves of the second sleeve part; - the fitting assembly comprises further two sealing members for sealing the connection between the second sleeve part and the corrugated tube which said two sealing members for sealing the connection between the second sleeve part and the corrugated tube, in use are located between corrugations of said corrugated tube; - the fitting assembly comprises further at least one attachment member of said attachment means for attaching the corrugated tube in to the fitting assembly such that the corrugated tube is sealably connected to the second sleeve part; wherein - the attachment member is a locking ring configured to be fitted in a corrugation of said corrugated tube and between the outer side of the corrugated tube and a locking corner of the first sleeve part; - the coupling end of the second sleeve part abuts against the locking ring; - the locking ring is separate from the sealing members (25, 26) as well as the locking ring is in abutting relationship with both, the first sleeve part and the second sleeve part.