A photographing lens assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element and a sixth lens element. The first lens element with positive refractive power has a convex object-side surface at a paraxial region. The second through the sixth lens elements have refractive power. The fourth lens element has a concave object-side surface at a paraxial region and a convex image-side surface at a paraxial region. The fifth lens element has an aspheric object-side surface and an aspheric image-side surface. The sixth lens element has a concave image-side surface at a paraxial region, wherein the image-side surface thereof has a convex shape at an off-axis region, and both surfaces thereof are aspheric. The photographing lens assembly has a total of six lens elements with refractive power.