Flat wiring laminated member and wire harness

A flat wiring laminated member comprising:

• a plurality of electric wires each having a linear outer shape and arranged in a width direction orthogonal to an axial direction of the electric wire;
• and
• a sheet member that is a sheet-like insulator collectively covering the plurality of electric wires and is allowed to be folded and laminated in a state of covering the electric wires;
• wherein
• the sheet member includes
• a linear tearing portion that is formed in a manner of connecting one end portion and another end portion in the axial direction between the electric wires adjacent to each other in the sheet member, and serves as a fold when the sheet member is folded, the linear tearing portion being allowed to be torn along the linear portion with a tearing force of less than 4.91 N, and
• a fixing portion that is provided on overlapping surfaces of the sheet member in a folded state and configured to fix the overlapping surfaces in the folded state.