Disclosed are an aroma diffuser head securing assembly and an aroma diffuser apparatus using the aroma diffuser head securing assembly, wherein the aroma diffuser head securing assembly is adapted for being connected with a neckless chamber body, the neckless chamber body having a receiving space and a chamber opening adapted for communicating the receiving space with an external environment, wherein the aroma diffuser head securing assembly including a top securing element, a middle securing element, and a bottom securing element, wherein the top securing element has a penetrative hole and is partially received in the chamber opening； the bottom securing element is received in the receiving space, a top end of the bottom securing element being connected to the top securing element and meanwhile abutting the middle securing element； and the middle securing element is sandwiched between the top securing element and the bottom securing element and is arranged to abut the chamber opening.
