Tilt arm for seat and vehicle seat

A tilt arm for a seat to be applied to a vehicle seat, the tilt arm supporting a cushion pad together with a cushion frame and movable in a pivoting manner when changing an angle of inclination of a front end portion of the cushion pad, the tilt arm comprising:

• a coupling arm portion pivotably coupled to a side frame of the cushion frame;
• and
• a leading-end-side arm portion coupled and fixed to a leading end portion of the coupling arm portion at a fixed portion of the tilt arm, wherein
• a first plate member constitutes the coupling arm portion and a second plate member constitutes the leading-end-side arm portion,
• in a side view of the tilt arm, the coupling arm portion and the leading-end-side arm portion are coupled and fixed to each other at the fixed portion so as to overlap with each other in a plate thickness direction at at least two portions such that a space is defined between the coupling arm portion and the leading-end-side arm portion, and
• the at least two portions comprise a first portion and a second portion, and an overlapping direction at the first portion is a direction intersecting with an overlapping direction at the second portion.