Separation membrane, sheet channel material, and separation membrane element

A separation membrane comprising:

• a separation membrane main body having a feed-side face and a permeate-side face;
• and a permeate-side channel member fixed onto the permeate-side face of the separation membrane main body,
• wherein the permeate-side channel member comprises polypropylene as a main component and satisfies the following requirements (a) to (c):
• (a) a softening point temperature is 60° C. or higher;
• (b) a tensile elongation in a standard state is 10% or more;
• and
• (c) a yield point stress under a wet condition at 50° C. is 2 MPa or more.

A sheet channel member having projections fixed to a sheet, wherein the projections comprise polypropylene as a main component and satisfy the following requirements (a) to (c):

• (a) a softening point temperature is 60° C. or higher;
• (b) a tensile elongation in a standard state is 10% or more;
• and
• (c) a yield point stress under a wet condition at 50° C. is 2 MPa or more.