伪足（英语：Pseudopodia）是细胞伸出类似足状的部分，由原生质体形成的临时细胞器。伪足会依形状分成叶形状伪足、丝形状伪足、根形状伪足，有轴伪足4种。如单细胞生物（变形虫）就会利用伪足摄食。

Pseudopods or pseudopodia (singular: pseudopodium) (from the Greek word ψευδοπόδια, ψευδός "false" + πόδια "feet") are temporary cytoplasm filled projections of eukaryotic cell membranes or unicellular protists. They may be used for motility, or ingesting nutrients or other particulate matter. Cells that possess this faculty are generally referred to as amoeboids. Pseudopodia extend and contract by the reversible assembly of actin subunits into many microfilaments. Filaments near the cell's end interact with myosin which causes contraction. The pseudopodium extends itself until the actin reassembles itself into a network.