On 11 May, a 30-year-old working for Hyundai sub-contractor Bo-Kwang, suffered a fatal 20-metre fall while dismantling scaffolding at the Hyundai Samho yard.
A labour union is arguing that there was no guardrail where the incident occurred.
The previous day saw the death of a sub-contractor at the Hyundai Mipo dockyard following a fall from a ladder on 27 April.
One of the two Hyundai workers who has died this year was Lee Sunghwee, who was hit by a five-tonne forklift truck operated by another staff member.
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