A shower curtain rod contains: multiple coupling posts and multiple rotatable connection assemblies. A respective one rotatable connection assembly includes: a first connector, a second connector, a flexible seat, and a fixing bolt. The first connector has a first locating portion and a first rotatable joining portion. The first rotatable joining portion has a through hole and multiple notches. The second connector has a second locating portion and a second rotatable joining portion. The second rotatable joining portion has two opposite tabs and an accommodation groove. The flexible seat is received in the accommodation groove and includes a sole plate and two side plates. A respective one side plate has a passing aperture, a positioning protrusion, and at least one elastic sheet. The fixing bolt is configured to rotatably connect the first rotatable joining portion in the trench between the two side plates.