The store is located in a new shopping centre in Majadahonda, and people planning holidays to Madrid may well fancy a short excursion to the centre to pick up a few bargains during their break.
However, they'll have to set aside some time to get around the store - as it covers some 32,000 sq ft over two floors.
It is the 26th Primark outlet to be opened in Spain and the seventh in Madrid alone. Primark's clothing range is proving particularly popular across Europe, as it now has 236 outlets across the continent.
The latest addition to that list was opened in Majadahonda by Spanish fashion entrepreneur Covadonga O'Shea. A descendant of an Irish family which left the Emerald Isle in the 17th century for the warmer climate of Malaga, Ms O'Shea founded Isem, Spain's first fashion business school, back in 2001.
Primark chief executive Paul Marchant said: 'We are honoured to have someone of Irish descent open our store given Primark's roots in Ireland.'
Primark director Breege O'Donoghue added: 'When we open in a new country, we like to look for educational establishments to make a link and as she is the president of a fashion business college, we called her up and as a result built a good relationship with her in Spain. Two of her MBA students worked in our Dublin office last year.'
The firm's Spanish invasion is not finished there, for Primark plans to open another seven shops in the country later this year. At present, it employs 3.500 people in the country and its sales growth continues to buck retail trends.
Meanwhile, Primark is not the only company to boost its presence in Madrid recently. Apple opened its third store in the city last week, taking the total number of outlets in Spain to six.
The Apple store is located in the north-west of the city in the Centro Comercial Gran Plaza 2 shopping centre. Its opening hours are from 10am to 10pm Monday to Saturday, but it does not open on Sundays.
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