Skripsi ini membahas bagaimana gambaran sistem manajemen keselamatan dankesehatan kerja (SMK3) di PT X, sebuah perusahaan kontraktor pertambangan batubara dilihat dari tingkat kematangan budaya keselamatan dan kesehatan kerja yang adadi PT X. Penelitian dilakukan dengan pendekatan semi-kuantitatif dengan desain studicross-sectional pada pekerja level pelaksana dan middle management bulan Oktober2012. Variabel-variabel kematangan budaya K3 nantinya akan dikelompokkan ke dalam siklus PDCA OHSAS 18001 dan dilihat mana yang masih perlu diperbaiki, mana yangperlu ditingkatkan. Hasil penelitian menunjukkan siklus Perencanaan, Implementasi,Pemeriksaan, dan Tindakan perbaikan masih perlu diperbaiki di beberapa poin untukmencapai continuous improvement.
Kata Kunci: Safety Culture Maturity, PDCA, SMK3

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The focus of this study is how occupational health and safety management system canbe seen by safety culture maturity model in PT X, a mining contractor. This research issemi-quantitative descriptive interpretative with cross-sectional study design in frontline workers and middle management in October 2012. The variables of safety culturematurity is grouped in PDCA cycle of OHSAS 18001 and we can see which one is needto be maintenance and which one is need to be improved. The result of this research isthere is something in whether Plan, Do, Check, and Action cycle that need to beimproved to reach the continuous improvement state.
Key words: Safety Culture Maturity, PDCA, OHSMS