A
flame-retardant
polyester fiber containing a
phosphorus compound copolymerized
polyester satisfying the following formulas (1)-(3) and having a
phosphorus atom content of 500-50,000 ppm: (formula 1)
tan delta max >= 0.1740 , (formula 2) T alpha - 3.77 x 1n (dtpf) <= 137.0; (formula 3) 1.331 <= SG -
DELTA n DIVIDED 8.64 <= 1.345 wherein
tan delta max is the maximum value of loss tangent in a
dynamic viscoelasticity measurement, T alpha is a temperature at which loss tangent reaches the maximum, dtpf is
single fiber fineness (dtex), SG is density (g / cm<3>), and
DELTA n is
birefringence, particularly a
flame-retardant
polyester fiber showing an L value of not less than 67 and a b value of not more than 10.00 as measured with a Hunter's color-difference meter, a
flame-retardant polyester woven, knitted fabric using this flame-retardant polyester
fiber at least in a part thereof, and a suede raised woven, knitted fabric which is a raised woven, knitted fabric obtained by applying a raising treatment to this flame-retardant polyester woven, knitted fabric, which has a
coefficient of friction of a surface of the woven and knitted fabric by a surface tester KES-FB4 of 0.200-0.300. By this constitution, a flame-retardant polyester fiber, a woven, knitted fabric, a
nonwoven fabric and a suede raised woven, knitted fabric superior in
dyeing property and
mechanical property such as abrasion resistance,
heat stability and the like, can be provided, which have extremely fine whiteness, a soft feeling and flame retardancy stable over a long period of time.