"Embedded Clauses as Qualifier of 'something': A Functional Grammar Approach" aims to analyse and describe structure and meaning of clauses that function as postmodifying element or Qualifier of the word something and furthermore to analyse and describe their logico-semantic relations. This research uses Functional Grammar approach. Analysis is conducted by describing the ideational structure of nominal group something + embedded clause. Ideational structure consists of logical and experiential structures. Then the logico-semantic relation between something and the embedded clauses was analysed and described by revealing its types. From the total of one hundred and eight data obtained from the British National Corpus the writer chose thirty five data as sample to be analysed and described. The thirty five data then are analysed and described using the theory of Functional Grammar of Halliday and Matthiessen (2004), Bloor and Bloor (2004), Martin, Matthiessen and Painter (1997), Lock (1996), Thompson (1996), Gerot and Wignell (1995), Eggins (1994), and Butt, et. al (1993).