I am pleased to announce and invite you to the 27th Linear Accelerator Conference, LINAC14, to take place at the International Conference Centre in Geneva, Switzerland on 1-5 September 2014. This conference is the main bi-yearly gathering for the world-wide community of linac specialists. It provides a unique opportunity to hear about the latest advances of projects and developments concerning hadron and lepton linacs, and their applications. In the tradition of previous LINAC conferences, plenary sessions including invited speakers are scheduled every day. Poster sessions will be held on Monday, Tuesday and Thursday afternoons. There will also be two special events on Sunday 31st August, namely a student poster session and an evening reception for registrants and their companions at the Globe of Science and Innovation at CERN. Participants are also warmly invited to join an outing to Chamonix, France and the beautiful surrounding mountains on Wednesday afternoon, and to visit the major CERN facilities on Friday afternoon, after the formal end of the conference. Participants of LINAC14 will include representatives of institutions and companies involved in the design, construction or use of linear accelerators. Companies interested in promoting their products are encouraged to hold a booth in the industrial exhibit and to apply for sponsorship. The active participation of students is encouraged, with incentives and funding available for supporting those who qualify. We encourage you to register as soon as possible. A reduced fee for early registration is offered until 15th June 2014. The fee covers lunches from Monday to Thursday, a banquet on Thursday evening and the Wednesday outing.