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Tensile fatigue performances of selected natural rattan strips (NRSs) and synthetic rattan strips (SRSs) were evaluated by subjecting them to zero-to-maximum constant amplitude cyclic tensile loading. Experimental results indicated that a fatigue life of 25,000 cycles began at the stress level of 50% of rattan material ultimate tensile strength (UTS) value for NRSs evaluated. Rattan core strips’ fatigue life of 100,000 cycles started at the stress level of 30% of its UTS value. Rattan bast strips could start a fatigue life of 100,000 cycles at a stress level below 30% of material UTS value. SRSs didn’t reach the fatigue life of 25,000 cycles until the applied stress level reduced to 40% of material UTS value and reached the fatigue life of 100,000 cycles at the stress level of 40% of material UTS value. It was found that NRSs’ S-N curves (applied nominal stress versus log number of cycles to failure) could be approximated by <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mrow><mi mathvariant="normal">S</mi><mo>=</mo></mrow><msub><mi mathvariant="sans-serif">σ</mi><mrow><mi mathvariant="normal">ou</mi></mrow></msub><mo stretchy="false">(</mo><mn>1</mn><mo>−</mo><mi mathvariant="normal">H</mi><mo>×</mo><mi>lo</mi><msub><mi mathvariant="normal">g</mi><mrow><mn>10</mn></mrow></msub><mo>⋅</mo><msub><mi mathvariant="normal">N</mi><mi mathvariant="normal">f</mi></msub><mo stretchy="false">)</mo></mrow></semantics></math></inline-formula>. The constant H values in the equation were 0.10 and 0.08 for bast and core materials, respectively.