Garment or clothing accessory having at least one separable part and comprising disassemblable connection means between said at least one separable part and a main body of the same garment or clothing accessory, wherein said disassemblable connection means include a first disassemblable joining means of two opposite flaps (C1, B1), one of the body of the garment or clothing accessory and the other of the separable part, configured as a zip fastener including a first (11.1) and a second (11.2) continuous tape made of flexible plastic material, each fixed on a respective of said flaps (B1, C1) and opposite each other, and a second disassemblable joining means of said opposite continuous tapes (11.1, 11.2), configured as hook and loop fastener and produced in two continuous strips (12.1, 12.2) fixed respectively to said two opposite continuous tapes (11.1, 11.2), characterized in that said first disassemblable joining means configured as zip fastener comprises: - said first continuous flexible tape (11.1), provided on one face (11.3) thereof with a continuous longitudinal groove (11.4), delimited by corresponding flexible edges (11.5); - said second continuous flexible tape (11.2) provided, on one face (11.6) thereof opposite said face (11.3) of said first continuous tape (11.1), with a continuous longitudinal flexible rib (11.7), provided complementary to said groove (11.4) of said first continuous tape (11.1), so that said groove (11.4) and said rib (11.7) can produce between them a shape fit and/or force fit and/or elastic coupling; - a continuous longitudinal edge (11.8) provided at the free end of said first continuous tape (11.1) and configured as continuous linear guide, parallel with respect to said continuous groove (11.4), and - a slider, with an essentially U-shaped cross section, coupled slidingly, by means of a intermediate portion (13.1) thereof, with respect to said edge (11.8) configured as linear guide of said first continuous tape (11.1), and having a pair of free branches (13.2, 13.3) opposite each other and configured, together with said intermediate portion (13.1), as elastic gripper that acts elastically with pressure, on one side, on said first continuous tape (11.1) and, on the other, on said second continuous tape (11.2), so as to produce the disassemblable coupling between said rib (11.7) and said groove (11.4) of said first joining means, by means of sliding of the same slider along said guiding edge (11.8). - said first continuous flexible tape (11.1), provided on one face (11.3) thereof with a continuous longitudinal groove (11.4), delimited by corresponding flexible edges (11.5); - said second continuous flexible tape (11.2) provided, on one face (11.6) thereof opposite said face (11.3) of said first continuous tape (11.1), with a continuous longitudinal flexible rib (11.7), provided complementary to said groove (11.4) of said first continuous tape (11.1), so that said groove (11.4) and said rib (11.7) can produce between them a shape fit and/or force fit and/or elastic coupling; - a continuous longitudinal edge (11.8) provided at the free end of said first continuous tape (11.1) and configured as continuous linear guide, parallel with respect to said continuous groove (11.4), and - a slider, with an essentially U-shaped cross section, coupled slidingly, by means of a intermediate portion (13.1) thereof, with respect to said edge (11.8) configured as linear guide of said first continuous tape (11.1), and having a pair of free branches (13.2, 13.3) opposite each other and configured, together with said intermediate portion (13.1), as elastic gripper that acts elastically with pressure, on one side, on said first continuous tape (11.1) and, on the other, on said second continuous tape (11.2), so as to produce the disassemblable coupling between said rib (11.7) and said groove (11.4) of said first joining means, by means of sliding of the same slider along said guiding edge (11.8).